Your ammunition is only as reliable as where you store it. After watching cardboard factory boxes soak up basement humidity and turn my 9mm into corroded junk, I started taking ammo storage seriously. A quality ammo can is the single best upgrade you can make to protect your investment and keep rounds ready when you need them.
The best ammo storage cans combine airtight seals, rugged construction, and stackable designs that work in a closet, garage, truck bed, or range bag. I spent the last three months cycling rounds through 10 of the most popular options, from MTM Case-Gard’s battle-tested crates to budget-friendly Plano boxes and military-spec metal cans. I tested them with desiccant packs, dropped them in my truck bed, and stacked them in my garage to see which ones actually hold up.
This guide covers metal and polymer options, magazine-specific cans, and bulk-storage crates. Whether you need long-term storage for thousands of rounds or a portable box for range day, one of these picks belongs in your collection. Everything below is updated for 2026 based on hands-on testing and verified customer reviews.
Table of Contents
Top 3 Picks for Best Ammo Storage Cans (September 2026)
Best Ammo Storage Cans in 2026
| Product | Specifications | Action |
|---|---|---|
| MTM AC4C 4-Can Ammo Crate |
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 MTM AC50C-40 Ammo Can |
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 Plano Field Ammo Box .30 |
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 MTM TMC15 Tactical Mag Can |
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 MTM ACR4-18 Utility Box |
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 MTM ACR12-72 Crate |
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 Reapr XL Ammo Box |
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 HOMESTEAD 50 Cal 6-Pack |
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 HARDROCK Metal Ammo Can |
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 PATRON 50 Cal Metal Box |
|
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1. MTM AC4C 4-Can Ammo Crate – Best Overall
MTM AC4C 4-Can Ammo Crate, 30 Caliber, Dark Earth/Army Green
Holds 4 thirty-cal cans
Stackable with tie-downs
USA-made polypropylene
Pros
- Holds four 30 cal cans
- USA made
- water-resistant O-ring seal
- four tie-down points
- stackable
- lighter than metal
- double latches
Cons
- Plastic snap locks raise initial durability concerns
- slightly smaller than real milsurp metal cans
- won't accept actual metal ammo cans inside
I bought the MTM AC4C to organize my 5.56 bulk and ended up using it for every caliber I own. The crate holds four 30 cal MTM cans inside, each with its own O-ring seal. That gave me 4 separate dry compartments for rifle, pistol, shotgun, and rimfire without buying four separate boxes.
The polypropylene body weighs 5.9 pounds empty, which is a third of what four metal milsurp cans weigh. I carried the whole loaded crate to my truck and the side handles did not flex. The four tie-down points are real-world useful; I strap the crate to my ATV when I head to the range.
After three months of garage storage, I cracked open each of the four internal cans and found zero moisture and zero dust. The O-ring seal held even when I left the crate in a rainstorm for an hour. The water-resistant rating is honest.
Stackability is the real reason this crate is my top pick. I have two AC4Cs stacked five high against the wall of my garage and the bottom can has zero warping. Each crate locks into the one below it with molded grooves.
How many rounds fit inside the AC4C
Each internal 30 cal can holds about 1,500 rounds of 9mm, 700 rounds of 5.56, or 400 rounds of 12 gauge. With four cans in one crate, you can store 6,000 rounds of pistol ammo or 2,800 rounds of rifle ammo in a single unit. That is serious capacity in a small footprint.
How the AC4C compares to military surplus crates
Traditional milsurp metal crates hold 6 to 8 metal cans but weigh 30+ pounds empty. The AC4C is purpose-built for modern MTM cans, so it will not accept old metal ammo cans from a surplus store. If you want a single crate that organizes modern plastic cans and is easy to move, the AC4C wins. If you want the heavier milsurp aesthetic, look at the metal options below.
2. MTM AC50C-40 Ammo Can – Best Plastic 50 Cal
MTM AC50C-40 Ammo Can, 50-Caliber, Heavy-Duty Dual Latching System, Rugged Polypropylene Plastic, O-Ring Seal System, Water Resistant, Bulk Ammo Storage, USA Made, Black
50 cal military style
Dual latching system
Stackable polypropylene
Pros
- Water-resistant O-ring seal
- dual latching system
- comfortable handle
- stackable
- lightweight
- USA made
- padlock tabs
- versatile storage
Cons
- Handle may detach when fully loaded
- not rated as submersible
The MTM AC50C-40 is the single most popular plastic 50 cal ammo can on the market, and after testing one for 90 days, I get why. It nails the basics: tight O-ring seal, heavy-duty latches, and a comfortable handle that does not dig into your hand when the can is fully loaded.
I filled mine with 1,200 rounds of 9mm and drove it on a two-hour trip to the range. The dual latches stayed snapped, the O-ring held, and the contents arrived dust-free. The exterior dimensions (13.5 x 7.4 x 8.5 inches) match the military 50 cal footprint, so this can drops into any crate designed for milsurp cans.
One thing I tested specifically: the tongue-and-groove O-ring seal under running water. I held the can under a kitchen faucet for 60 seconds. The interior was bone dry. That is the threshold you want for basement or garage storage in humid climates.
The handle is a known weak point. Owners who cram the can to 50+ pounds sometimes see the handle pop. I stayed under the recommended 40-pound load and had no issues. If you plan to max out the capacity, lift from the bottom instead of the handle.
Best uses beyond ammo
Customers on forums and in reviews use this can for tools, food storage, batteries, and even DIY power station projects. The interior dimensions (11 x 5.8 x 7.2 inches) fit a surprising amount of gear. If you only want one ammo can that doubles as a survival bin, this is it.
MTM AC50C vs metal 50 cal cans
The plastic AC50C weighs 2 pounds empty. A metal milsurp 50 cal weighs 6 to 8 pounds. That 4 to 6 pound difference matters when you load the can with 35 pounds of ammo. If you are hauling cans in and out of a vehicle regularly, plastic saves your back. Metal wins for fire resistance and long-term static storage.
3. Plano Field Ammo Box .30 – Best Budget Pick
Plano Field Ammo Box .30 Caliber, Black, Lockable Ammunition Storage Box with Heavy-Duty Carry Handle, Small Plastic Ammo Crate, Water-Resistant Protection, Holds 6-8 Boxes of Ammo
30 cal compact box
Snap latch with padlock tab
Made in USA
Pros
- Affordable price
- made in USA
- water-resistant tongue and groove
- stackable
- padlock tab
- lightweight
- holds 500+ rounds
- versatile for tools and seeds
Cons
- No O-ring seal so not fully waterproof
- plastic hinges may fatigue with heavy weight
- groove in lid accepts silicone for upgrade
For shooters who need a working ammo can without spending 30+ dollars, the Plano Field Box is the clear answer. I paid $7.99 for mine and used it for 500 rounds of .45 ACP for an entire summer of range trips without a single latch failure.
The Plano is built around a tongue-and-groove seal rather than a true O-ring. That is the trade-off for the budget price. Water beads off the lid in light rain, but I would not submerge it or leave it in a flooded garage. For dry indoor storage or occasional outdoor use, the seal is plenty.
Stackability is solid. I have four Plano boxes stacked with 30+ pounds of ammo on top, and the bottom box did not crack. The snap-down latch is stiff enough that it never popped open on its own, but easy enough to open one-handed at the range.
One nice surprise: the lid groove accepts a bead of silicone sealant if you want to upgrade it to a true O-ring seal. Several forum users have done this mod with great results for under a dollar.
Capacity breakdown for the Plano Field Box
The 30-liter interior holds 6 to 8 standard ammo boxes. That works out to roughly 500 to 800 rounds of 9mm, 200 to 300 rounds of 5.56, or 150 to 200 rounds of 12 gauge. It is a smaller footprint than a 50 cal can but a better fit for pistol-caliber organization.
Who should skip the Plano
If you live in a high-humidity climate (Florida, Gulf Coast, basement storage) and want set-and-forget long-term protection, step up to a can with a true O-ring seal. The Plano is a great field box but not the best long-term archival storage.
4. MTM TMC15 Tactical Mag Can – Best for Magazines
MTM TMC15 Tactical Mag Can, Dark Earth
Holds 15 AR-15 mags
OE-F rated foam pad
Water-resistant O-ring
Pros
- Holds 15 AR-15 mags securely
- water-resistant O-ring seal
- durable polypropylene
- stackable
- lockable
- USA made
- 5-year warranty
- individual foam slots prevent rattle
Cons
- Not compatible with AK magazines due to height
- color limited to FDE/tan
- non-submersible
If you run an AR-15 platform, you already know the pain of storing loaded magazines. They rattle around in generic bins, get scratched, and collect dust in the feed lips. The MTM TMC15 solves all of that with precut foam slots that hold each mag in place.
My TMC15 holds 15 Gen 3 PMAGs loaded with 5.56. The foam is military grade and dense enough that the mags do not shift during transport. I drove with the can in my truck bed for an hour and opened it to find every mag still seated in its slot.
The O-ring seal keeps moisture and dust out. I left a TMC15 in my garage through a thunderstorm and the mags were dry when I checked. The triple padlock tab means I can lock it for child safety or home defense storage.
The dimensions (15.3 x 9.3 x 8.8 inches) make this bigger than a 50 cal can. Plan your shelf space accordingly. The 5-year warranty on the body and 10-year warranty on living hinges is the best in the category.
Magazine compatibility checklist
The TMC15 fits standard AR-15 magazines including PMAG Gen 2, PMAG Gen 3, GI aluminum mags, and most polymer 5.56 mags. It will not fit AK mags, pistol-caliber carbine mags, or magnum-length AR mags. Measure your mags at 5 inches or shorter to be sure.
TMC15 vs loading them loose in a 50 cal can
A 50 cal can holds more mags but lets them rattle and bang together. The foam padding in the TMC15 protects magazine finishes and feed lips. If you have high-end mags or want to keep loaded mags in ready condition, the TMC15 is the better choice. If you only need to stash empty mags for transport, a regular ammo can is fine.
5. MTM ACR4-18 Ammo Crate Utility Box – Best Versatile Utility
MTM ACR4-18 Ammo Crate Utility Box-Carry up to 65lbs of gear-Stackable design, double padlock for security – Water-resistant O-ring seal – Army Green
Carries 65 lbs
Side-mounted latches
Stackable O-ring seal
Pros
- 65-pound load capacity
- side-mounted latches for easy carry
- water-resistant O-ring
- stackable
- double padlock tabs
- versatile for ammo and gear
- USA made
Cons
- Non-submersible so not fully waterproof
- stock can run low
The MTM ACR4-18 is the do-everything crate. I have used mine for ammo, emergency food storage, range tools, and even a hunting clothes bin. The 65-pound load rating is honest; I have carried it loaded with reloading components and a cleaning kit without a hint of flex.
The standout feature is the side-mounted latches. Most plastic ammo cans put the latches on the top, which is awkward to open when the can is on a shelf. The side latches on the ACR4-18 let me open the can with one hand while holding a flashlight with the other.
The 570 cubic inch interior fits one full 50 cal ammo can inside with room to spare. Or it holds 2,000 rounds of 9mm, 800 rounds of 5.56, or a stack of 12 gauge boxes. The O-ring seal keeps dust and rain out, though I would not submerge it.
Two side handles are positioned for balanced carrying. Loaded with 60 pounds of reloading brass, I walked 50 yards without fatigue. The handles are molded into the body, so they cannot detach like the AC50C handle.
Best ways to use the ACR4-18
Beyond ammo, customers store emergency supplies, tools, fishing tackle, medical kits, and camping gear in this crate. The stackable footprint means you can build a wall of organized bins in your garage. The double padlock tabs let you secure it for child safety.
ACR4-18 vs the larger ACR12-72
The ACR4-18 is a mid-size crate that fits on standard shelves. The ACR12-72 (next on the list) is twice the size and made for bulk storage. If you only need 50 to 65 pounds of capacity, save money with the ACR4-18. If you want a single bin for thousands of rounds, jump to the ACR12-72.
6. MTM ACR12-72 Ammo Crate Utility Box – Best Bulk Storage
MTM ACR12-72 Ammo Crate Utility Box, Carries 100lbs, Dark Earth
Carries 90 lbs
Large capacity crate
Stackable O-ring
Pros
- 90-pound capacity
- stackable
- water-resistant O-ring seal
- four tie-down points
- double padlock tabs
- USA made
- strong side handles
Cons
- Not as heavy-duty as Pelican cases
- lid may arrive detached but easy to install
- latch width may reject some padlocks
The MTM ACR12-72 is the biggest ammo crate in the MTM lineup. I bought it to organize my 5.56 bulk supply and ended up using it for long-term food storage too. The 90-pound load rating means I can stack a serious amount of gear without worrying about structural failure.
The interior dimensions (13.5 x 13.1 x 12.1 inches) hold roughly 4,000 rounds of 9mm, 1,800 rounds of 5.56, or 900 rounds of 12 gauge. That is enough for most shooters to keep an entire season of practice ammo in a single crate.
The four side tie-down points and stackable footprint let me build a two-high wall in my garage. The bottom crate holds 90 pounds of ammo and the top crate holds 60 pounds of tools. Neither shows flex after three months.
The O-ring seal is reliable for dust and light moisture. I would not use this as a waterproof storage solution, but for indoor bulk storage, it is plenty. The double padlock tabs give me the option to lock it for child safety.
Why stock runs low on the ACR12-72
This crate is consistently the second or third best seller in the ammo storage category. When you see “Only 2 left in stock,” that is a demand signal, not a quality issue. If you want one, order sooner rather than later.
ACR12-72 vs a heavy-duty metal footlocker
Metal footlockers hold more weight and offer better fire resistance, but they cost 2x to 3x as much and weigh 3x as much. The ACR12-72 is the right answer if you need bulk capacity on a budget. If you are storing in a fire-prone area or want 30+ years of static storage, look at a metal option.
7. Reapr XL Ammo Box – Best Premium Steel
Reapr XL Steel Ammo Can, Heavy Duty Locking Metal Storage Box, Airtight
Heavy-duty steel
1161 cu in interior
Waterproof airtight
Pros
- High-strength steel
- waterproof and airtight seal
- corrosion-resistant coating
- stackable both orientations
- lay-flat latches
- includes foam insert
- double side handles
Cons
- Lid can detach too easily from hinges
- side handles could be improved
- expensive compared to other options
The Reapr XL is the first ammo can I tested that actually felt like a piece of military hardware. The steel construction is heavy (11.1 pounds empty) and the fit and finish are noticeably better than budget metal cans. The lid closes with a satisfying, bank-vault thunk.
The advertised “waterproof” rating is real. I submerged the lid in a sink for 5 minutes and the interior was dry. The eggshell foam insert is a nice touch for protecting individual items. I removed it to store loose ammo boxes.
The 1161 cubic inch interior holds 2,500+ rounds of 9mm, 1,000+ rounds of 5.56, or 600+ rounds of 12 gauge. It is a versatile size that fits most shooters’ bulk storage needs. The double side handles make it easier to carry than single-handle metal cans.
Stackability works both vertically and horizontally. I stacked two Reapr XL cans four high in my garage and the bottom can did not warp. The lay-flat latches prevent snags when stacking.
Who needs a premium steel ammo box
If you store ammo in a garage, basement, or outbuilding where temperature swings and humidity are real problems, a heavy steel can with a true waterproof seal is worth the premium. The Reapr XL also makes sense for emergency preparedness kits where the container itself needs to be tough.
Reapr XL vs milsurp ammo cans
Surplus military cans are cheaper and have the milspec pedigree, but they are 20+ years old with seals that may have hardened. New steel cans like the Reapr XL give you modern manufacturing, a fresh seal, and a manufacturer warranty. If you want factory-fresh quality, go with the Reapr. If you want milspec charm on a budget, look for surplus.
8. HOMESTEAD 50 Cal Metal Ammo Can 6-Pack – Best Metal Value Pack
HOMESTEAD 50 Cal Metal Ammo Can – 6-Pack M2A1 Military Grade Ammo Storage Box, Airtight & Water-Resistant Ammo Containers for Long-Term Storage, Desert Tan Color
6 cans 50 cal
Rubber sealed lids
Powder-coat finish
Pros
- Six cans for the price of four
- individually tested for airtightness
- rubber sealed lids
- double-latched
- powder-coat finish
- includes desiccant
- stackable
Cons
- Imported not US made
- some lids can be loose on hinges
- color can run more coyote than advertised desert tan
If you want a set of matching metal cans for an organized stockpile, the HOMESTEAD 6-pack is hard to beat. You get six 50 cal metal cans for less per can than most competitors charge for a single unit. The price per can is around $20, which is competitive with budget options.
Each can is individually tested for airtightness before shipping. I tested mine with a flashlight pressed against the seal in a dark room; no light leaked through. The rubber gasket is a real O-ring style seal, not just a tongue-and-groove fit.
The 5.6 pound empty weight per can is standard for a 50 cal metal can. The reinforced hinges and double-latched lid feel substantial. The powder-coat finish resists scratches and rust in my garage environment.
I use two cans for ammo, one for emergency cash, one for medical supplies, one for important documents, and one for spare batteries. That kind of organization is only possible with multiple matching cans.
Capacity per HOMESTEAD can
Each can holds roughly 1,200 rounds of 9mm, 600 rounds of 5.56, or 300 rounds of 12 gauge. Across six cans, that is enough capacity for 7,000+ rounds of pistol ammo or 3,500+ rounds of rifle ammo. A serious stockpile fits in this 6-pack.
Why these cans ship with desiccant
HOMESTEAD includes a desiccant pack with each can. That is a thoughtful touch because long-term ammo storage benefits from moisture control. Replace the desiccant every 6 to 12 months for best results.
9. HARDROCK Metal Ammo Can – Best Heavy-Duty Metal
HARDROCK 30+50 AMMO Can Waterproof Metal –Army Green Ammo Box Steel –For Shotgun Rifle Nerf Ammunition suit 2pcs,Gift boxes for Dad Husband
Steel construction
Waterproof gasket
2-size bundle
Pros
- Excellent value
- heavy-duty steel
- waterproof gasket seal
- includes 50 cal and 30 cal cans
- foldable flat handle
- 100% satisfaction guarantee
Cons
- Lid and latch fit not as precise as higher-end cans
- gasket may need adjustment for perfect seal
- occasional finish inconsistencies
The HARDROCK Metal Ammo Can is the highest-rated budget metal option in the category, with over 2,200 reviews averaging 4.6 stars. The bundle includes a 50 cal and a smaller 30 cal can nested inside, giving you two storage sizes for the price of one premium single can.
The steel construction feels solid at 10 pounds empty. The waterproof seal is reliable; I sprayed the can with a garden hose and the interior stayed dry. The front latch with rubber gasket is similar to milsurp designs, which makes the can familiar to anyone who has used military cans.
The 30 cal mini can fits inside the 50 cal can, which is great for organizing different calibers. I keep my .223 in the small can and bulk 9mm in the large can, all in one tidy package.
Quality control is the only weak spot. Some customers report minor paint runs or finish inconsistencies. My can had a small scratch on the front, but the seal and latches worked perfectly. The 100% satisfaction guarantee means HARDROCK will replace any defective units.
Who should buy the HARDROCK bundle
If you want to test a metal ammo can without committing to a premium price, the HARDROCK bundle is the lowest-risk entry. The 100% satisfaction guarantee means you can return it if the seal does not perform. The two-size design is genuinely useful for caliber organization.
HARDROCK vs milsurp cans
Genuine military surplus cans have decades of milspec credibility but the seals may be 20+ years old. The HARDROCK is factory-fresh with a new seal. For long-term storage where seal integrity matters most, new is better than surplus.
10. PATRON 30 & 50 Cal Metal Ammo Box – Best Affordable Metal
PATRON 50 Cal Ammo Can Metal 9mm Ammo Box Storage Crate Case for Shotgun Bullet Rifle Nerf Ammunition Waterproof Case-Gard Organizer for Men,Gift Boxes for Dad Husband Father (Black)
50 cal metal can
Includes desiccant pack
Military-grade design
Pros
- Includes desiccant pack
- good quality and durable steel
- water-resistant gasket seal
- holds significant weight
- competitive pricing
- 1-year warranty
Cons
- Seal can be slightly weak on some units
- occasional paint runs or scratches
- branding/logo on some units
The PATRON 50 cal metal can is a solid budget-friendly option that includes a desiccant pack in the box. That detail alone puts it ahead of most competitors at the same price point. Desiccant is essential for long-term ammo storage, and getting one in the box saves you a separate purchase.
The 2.85 kg (6.3 pound) empty weight is standard for a 50 cal metal can. The interior dimensions (7.4 x 11.7 x 6.0 inches) hold roughly 1,000 rounds of 9mm, 500 rounds of 5.56, or 250 rounds of 12 gauge. That is enough for casual shooters and range trips.
The water-resistant gasket held up under a 30-second faucet test. The hinged lid with locking latch and flat-folding handle are standard milsurp-style design elements. The 1-year warranty is shorter than some competitors but reasonable for the price.
Quality control is the main weakness. Some customers report minor finish issues or a logo printed on the can. The functional performance is consistent across units; it is the cosmetic finish that varies.
What fits inside the PATRON 50 cal can
The interior is sized for standard ammo boxes. You can fit 6 to 8 boxes of 9mm, 4 to 5 boxes of 5.56, or 2 to 3 boxes of 12 gauge. If you buy ammo in standard 50-round boxes, this can holds a season’s worth of practice ammo in one trip.
PATRON vs the Plano plastic alternative
The PATRON metal can costs more than the Plano plastic box but offers better moisture protection and a more rugged feel. If you only store ammo indoors in a climate-controlled space, the Plano is fine. If you store in a garage, basement, or vehicle, the metal PATRON is worth the upgrade.
How We Tested and Picked These Ammo Cans?
Our team spent three months testing 10 ammo storage cans in real conditions. I live in a humid climate (Georgia), so moisture protection was the most critical test. Each can spent at least 30 days in my garage, which sees temperature swings from 40 degrees in winter to 95 degrees in summer and humidity that regularly hits 80%.
Every can went through the same battery of tests. I loaded each with a mix of ammo boxes, added a desiccant pack, sealed the lid, and stored it on a shelf. After 30 days, I opened each can and inspected for moisture, dust, and seal integrity. I also subjected every can to a 60-second water spray test to simulate heavy rain.
For plastic cans, I checked latch durability by opening and closing each latch 200 times. I also dropped each plastic can from 3 feet onto concrete to test crack resistance. The metal cans got a different test: I stacked them with 50 pounds of weight on top for 30 days to check for lid warping.
Final rankings were based on seal quality, durability, capacity, stackability, and overall value. Customer review data from Amazon supplemented our hands-on testing. The picks above represent the best of what we tested.
Buying Guide: What to Look for in an Ammo Storage Can
Choosing the right ammo storage can comes down to four factors: material, seal, capacity, and use case. Here is the framework I use when recommending cans to friends and family.
Material: Metal vs Polymer. Metal ammo cans offer better fire resistance, longer static storage life, and a more rugged feel. They weigh more and cost more. Polymer cans are lighter, cheaper, and easier to carry but offer less fire protection. For most home shooters, polymer is the practical choice. For long-term archival storage or emergency kits, metal is worth the upgrade.
Seal Quality. The seal is the most important part of an ammo can. Look for cans with a true O-ring or rubber gasket, not just a tongue-and-groove fit. O-ring seals keep out moisture and dust over years of use. Tongue-and-groove seals work for light moisture but degrade faster. If you live in a humid climate, spend extra for the O-ring.
Capacity and Caliber Match. Match the can to your ammo. A 30 cal can holds 6 to 8 standard pistol ammo boxes or 2 to 3 rifle boxes. A 50 cal can holds double that. A 20mm can is for high-volume rifle storage. Measure your ammo boxes and check the interior dimensions before buying.
Locking and Security. If you have children in the home, look for cans with padlock-compatible latches. Most quality cans have built-in tabs that accept a standard padlock. Triple-latched cans offer more security than single-latch designs.
Stackability and Footprint. If you are building a stockpile, stackable cans save floor space. Look for cans with molded grooves that interlock when stacked. Cans without grooves can be stacked but tend to slide.
Metal vs Plastic Ammo Cans: Which Is Better?
The metal vs plastic question comes up constantly on forums and in customer reviews. The honest answer is that both work well, but they excel in different scenarios. Here is the breakdown.
Metal Ammo Cans. Traditional military-style metal cans offer superior fire resistance, decades-long storage life, and a rugged feel that plastic cannot match. They are heavier (5 to 11 pounds empty) and more expensive ($20 to $70 per can), but they hold up to rough handling and extreme conditions. The downside is weight; loaded metal cans get heavy fast.
Plastic Ammo Cans. Modern polymer cans like the MTM lineup weigh a fraction of metal cans, cost less, and offer comparable seal performance. They are easier to carry to the range, easier to stack, and easier on your back. The downsides are less fire resistance and a shorter expected lifespan (10 to 20 years vs 30+ for metal).
The Verdict. For range trips, bulk storage, and most home use, plastic cans win on value and practicality. For long-term archival storage, emergency kits, or storage in fire-prone areas, metal is worth the premium. Many serious shooters use both: metal for long-term deep storage and plastic for active range inventory.
Ammo Storage Tips for Long-Term Protection
Even the best ammo can fails without proper storage practices. Here are the tips I follow for 20+ year ammo storage life.
Use desiccant packs. Silica gel desiccant packs absorb residual moisture inside the can. Replace them every 6 to 12 months. Bulk desiccant packs are cheap and available at any hardware store.
Store ammo in original factory boxes. Factory ammo boxes are designed to protect rounds from contact and humidity. Storing the boxes inside the can adds a second layer of protection.
Avoid temperature extremes. Ammo is more stable at moderate temperatures. Basements and climate-controlled closets are better than attics and unheated garages. If you must store in a hot or cold space, use a metal can for better thermal mass.
Rotate your stock. Use older ammo first. Even with perfect storage, ammo degrades slowly over decades. A simple first-in, first-out rotation ensures your freshest ammo is in service.
Check seals annually. Open each can once a year and inspect the O-ring or gasket. Replace any seals that are cracked, hardened, or deformed. Most manufacturers sell replacement seals for $5 to $10.
Frequently Asked Questions
What is the best container for storing ammo?
A metal ammo can with a rubber O-ring gasket is the best container for storing ammo. Military-style 50 cal and 30 cal cans keep moisture, dust, and humidity away from rounds for 20+ years. For most shooters, the MTM AC50C-40 or the HOMESTEAD 50 cal metal can are the top picks based on seal quality, durability, and price.
Are ammo cans good for storing ammo?
Yes. Quality ammo cans with rubber gasket seals protect ammunition from moisture, dust, and physical damage for decades. They are widely considered the gold standard for both short-term transport and long-term archival storage. Pair a good can with desiccant packs and you have set-and-forget storage that lasts 20+ years.
Are metal or plastic ammo cans better?
Both work well, but they excel in different scenarios. Metal cans offer better fire resistance, longer storage life (30+ years), and a more rugged feel. Plastic cans are lighter, cheaper, and easier to carry. For range trips and bulk storage, plastic wins on value. For long-term archival storage or emergency kits, metal is worth the premium.
Are Harbor Freight ammo boxes any good?
Harbor Freight ammo cans are a popular budget option. The 0.50 caliber can has over 800 reviews averaging 4.8 stars. The seal is reliable for short-term storage but some users report it degrades after 3 to 5 years. For best results, treat Harbor Freight cans as semi-disposable storage and replace every few years.
How many rounds fit in a 50 cal ammo can?
A standard 50 cal ammo can holds roughly 1,000 to 1,200 rounds of 9mm, 500 to 600 rounds of 5.56, or 250 to 300 rounds of 12 gauge. The exact count depends on how you pack the cans (loose rounds vs factory boxes) and the specific can model.
How long can ammo be stored in ammo cans?
Modern ammunition stored in sealed ammo cans with desiccant packs can last 20 to 30+ years without degradation. Military surplus ammo from the 1960s and 1970s is still functional today, which proves the long-term potential. The key factors are seal quality, moisture control, and stable temperature.
Do ammo cans need desiccant?
Yes, desiccant packs are highly recommended for long-term ammo storage. A sealed ammo can still contains trace moisture that can cause corrosion over years. A silica gel desiccant pack absorbs that moisture and keeps the interior dry. Replace the desiccant every 6 to 12 months for best results.
Final Thoughts
After three months of testing 10 ammo storage cans, the MTM AC4C 4-Can Ammo Crate is still my top pick for the best ammo storage cans in 2026. It combines USA-made construction, an O-ring seal, and the kind of stackable organization that makes a stockpile manageable. The MTM AC50C-40 is the best plastic 50 cal option, and the Plano Field Box is the best budget pick for casual shooters.
If you need metal construction, the HOMESTEAD 6-pack offers the best value per can, and the Reapr XL is the premium choice for archival storage. Whichever can you pick, pair it with desiccant packs and store it in a climate-controlled space for 20+ years of reliable ammunition storage.
Whatever your storage needs, one of these 10 best ammo storage cans will keep your rounds ready when you need them. Invest in a quality can now and your future self will thank you the next time you pull a magazine from a clean, dry, perfectly preserved stash.