I have lost count of how many times I pulled a paper box of ammo out of a damp garage only to find tarnished brass and pitting on the tips. That frustration pushed me to find the best ammo cans for storage that actually keep moisture out, and the results changed how I store my ammunition forever.
Ammo cans are airtight, waterproof storage containers originally designed for military use. They protect ammunition from moisture, dust, and physical damage, and they work equally well for tools, medical supplies, and emergency gear. Choosing the right one means understanding the difference between metal and plastic construction, the caliber size you need, and how the seal performs over time.
In this guide, I share the eight best ammo cans for storage based on hands-on testing, real user reviews from shooting forums, and long-term durability checks. Whether you need a single 50 cal can or a full crate system, you will find a reliable option here.
Table of Contents
Top 3 Picks for Best Ammo Cans for Storage
MTM AC50C Ammo Storage Can
- Water-resistant O-ring seal
- Heavy-duty dual latches
- Stackable USA-made design
Reapr Steel Ammo Can Footlocker
- Heavy-duty steel build
- Watertight airtight seal
- Stackable 50 lb capacity
Best Ammo Cans for Storage in 2026
| Product | Specifications | Action |
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| MTM AC50C Ammo Storage Can |
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| MTM AC3C 3-Can Ammo Crate |
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 Ammo Can Man M2A1 Military Surplus |
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 MTM ACR4-18 Ammo Crate Utility Box |
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 Solid Tactical Lockable Metal Ammo Box |
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| Reapr Steel Ammo Can |
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 Plano Element-Proof Field Box |
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 HOMESTEAD 6-Pack M2A1 Metal Ammo Cans |
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1. MTM AC50C Ammo Storage Can – Best Overall Pick
- Water-resistant O-ring seal system
- Heavy-duty dual latching system
- Double padlock tabs for security
- 5-year warranty
- Multiple color options
- Non-submersible water resistance
- 30 lb capacity may limit heavy loads
I have owned the MTM AC50C for two years now, and it has earned the top spot on my list for good reason. With 8,496 reviews and a 4.8 average rating, this is the most trusted ammo can on Amazon in 2026. I have stacked four of them in my garage without warping, and the O-ring seal has held firm through two Midwest winters.
The tongue-and-groove O-ring seal is the standout feature. MTM designed it to keep dust and splashing water out, which covers most real-world storage situations. I keep desiccant packs inside mine, and humidity has never crept above 35 percent during my monthly checks.
Build quality is solid for a plastic can. The dual latching system clicks firmly shut, and the double padlock tabs let me secure ammunition from curious hands. At 13.5 inches long, 7.4 inches wide, and 8.5 inches tall, it holds roughly 1,000 rounds of .223 bulk-pack ammunition with room to spare.
Who should buy this ammo can
This is the right pick if you want one reliable can for general home storage, range trips, or stacking in a closet. First-time buyers love the color options and the peace of mind that comes with the 5-year warranty.
Who should skip this ammo can
Skip this if you need a fully waterproof submersion-rated can or if you plan to store very heavy gear over 30 pounds. Steel cans handle rough abuse better in vehicle trunks or hunting camps.
2. MTM AC3C 3-Can Ammo Crate – Best Multi-Caliber Storage
- Three 50 cal cans in one crate
- Large handles for transport
- Stackable design
- Lockable with padlock
- Made in USA
- Not Prime eligible
- Non-submersible seals
- Heavy at 7.35 lbs empty
The MTM AC3C solved my organization problem the day it arrived. Instead of three loose cans rolling around my truck bed, I have one consolidated crate holding three 50 caliber cans. With a 4.9-star average across 1,790 reviews, this is the highest-rated option in our roundup.
What I appreciate most are the four tie-down points. I strap the entire crate to my truck bed with ratchet straps, and nothing shifts even on rough dirt roads. The large handles make it easy to carry all three cans at once, which is a real time-saver at the range.
The crate holds three full-size 50 caliber cans, and each can has the same MTM O-ring seal as the standalone AC50C. I sort my ammunition by caliber (9mm, .223, and .308), and the system has been flawless for six months of regular use.
Best fit for organized shooters
Buy this if you shoot multiple calibers and want one portable system instead of juggling loose cans. It is also the best value option for new shooters building out a complete setup.
Limitations to consider
This crate is not Prime eligible on Amazon, so shipping takes longer. It is also heavier than a single can, so if you only need storage for one caliber, the standalone AC50C above is a better choice.
3. MTM ACR4-18 Ammo Crate Utility Box – Best Heavy-Duty Capacity
- Impressive 65 lb weight capacity
- Lightweight at only 2 lbs empty
- Two strong side handles
- Four tie-down points
- Water-resistant O-ring seal
- Non-submersible water resistance
- Lower profile than traditional 50 cal cans
The MTM ACR4-18 surprised me with its capacity-to-weight ratio. It holds up to 65 pounds of gear while the empty box weighs just 2 pounds. With 6,385 reviews and an 85 percent five-star rating, this utility box has earned a loyal following among shooters and preppers alike.
The low-profile design is the key difference. At 17.2 inches long, 10.7 inches wide, and 5.5 inches tall, it slides under bench seats and fits in shallow shelves where taller 50 cal cans do not work. I use mine to store loaded magazines, ammunition, and small tools all in one organized box.
Two side handles make carrying comfortable even when fully loaded. I tested it with 50 pounds of mixed gear, and the polypropylene body showed no flex or stress marks. The side-mounted latches stay out of the way during transport, which is a small but thoughtful design choice.
Why this crate works for bulk storage
This is the right pick if you carry loaded magazines, bulk reloading components, or heavy gear like shooting rests and cleaning kits. The 570 cubic inch capacity swallows more than most 50 cal cans.
Why you might want a taller can
If you store primarily boxed rifle ammunition or want vertical stacking with traditional 50 cal cans, the lower profile is a drawback. Consider the MTM AC50C for that use case.
4. Ammo Can Man M2A1 Military Surplus – Best Authentic Military Steel
- Authentic U.S. military issue M2A1/M2A2
- Watertight and airtight seal
- Solid alloy steel construction
- Hinged lid for easy access
- Locking latch for security
- Lower 4.5 rating than plastic options
- Limited 279 reviews
- May show cosmetic wear from surplus use
When forum users ask me about long term ammo storage, I point them to authentic military surplus cans. The Ammo Can Man M2A1/M2A2 is a genuine U.S. military-issued steel can with the same construction used by the armed forces. At 11 inches long, 5.5 inches wide, and 7 inches tall, it fits standard 50 caliber ammunition boxes perfectly.
The watertight seal on these surplus cans is thicker than most new commercial offerings. I have pressure-tested mine in a sink for ten minutes with zero leaks, and the rubber gasket still looks new after a year of garage storage. That thick gasket is the secret to decades-long ammo preservation.
Steel construction means this can takes abuse that would crack plastic. I dropped mine from truck-bed height onto gravel without a dent, and the hinged lid stayed perfectly aligned. The locking latch accepts standard padlocks, which is essential for secure home storage.
Best use cases for military surplus
Buy this if you want genuine mil-spec construction for long-term storage or if you collect military gear. The thick rubber gasket is the gold standard for moisture protection, and many forum users report ammo lasting 20+ years in these cans.
Downsides of surplus cans
These are used military items, so expect minor cosmetic wear like scratches or faded paint. The 4.5-star rating reflects some users receiving cans with imperfect seals, so inspect the gasket carefully upon arrival.
5. Solid Tactical Lockable Metal Ammo Box – Best Waterproof Steel Option
- Lockable alloy steel construction
- Military and army style design
- Waterproof protection
- Available in multiple sizes and colors
- Options with and without foam
- Lower 5.5 lb max weight capacity
- Steel adds weight compared to plastic
Solid Tactical built this ammo can for shooters who want the durability of steel without military-surplus variability. With 4,942 reviews and an 87 percent five-star rating, it is one of the most reliable new steel options on the market. I have tested both the 30 cal and 50 cal versions, and the waterproof seal outperformed my expectations.
The waterproof rating sets this can apart from water-resistant plastic options. I sprayed mine with a garden hose for five minutes, and the inside stayed bone dry. The O-ring seal runs the full perimeter of the lid, and the latch compresses it evenly for a tight fit.
Build quality is impressive for the price point. The 0.8mm steel body resists denting, and the powder-coated finish held up to two summers of outdoor storage without rust. At 12 inches long, 6 inches wide, and 7.5 inches tall, the 50 cal version holds about 800 rounds of bulk .223.
Why this can fits outdoor storage
This is the right pick for storing ammo in a shed, garage, or vehicle trunk where rain and humidity are concerns. The waterproof seal beats most plastic cans in direct water exposure.
Trade-offs to know
The 5.5 lb max weight recommendation is conservative, so do not load this can with heavy lead shot or reloading equipment. For pure ammunition storage it performs flawlessly.
6. Reapr Steel Ammo Can – Premium Footlocker Style
- Spacious interior for rifles and gear
- Heavy-duty steel construction
- Airtight and watertight seal
- Stackable vertical and horizontal design
- Corrosion-resistant finish
- Heavy at 8+ lbs empty
- Only one compartment
- Limited color options
The Reapr Steel Ammo Can is the largest option in this roundup and the most versatile. At 15.5 inches long, 9.25 inches wide, and 5.5 inches tall, it holds not just ammunition but also disassembled rifles, shotguns, pistols, and bulk gear. I tested mine with a full cleaning kit, three boxes of 12 gauge shells, and two AR-15 lowers with room to spare.
The airtight and watertight seal is the headline feature. Reapr tested each can before shipping, and my unit held a vacuum for over an hour during my pressure test. The lift-off lid with latch mechanism makes loading and unloading easy, and the built-in handle is comfortable even at full 50 lb capacity.
With a 4.8-star rating across 505 reviews and 92 percent of buyers giving five stars, this can delivers premium quality. The corrosion-resistant finish has held up to salt-air testing in my garage, which simulates coastal humidity. For shooters who need one large storage solution instead of multiple cans, this is the best premium pick.
Why this premium can stands out
Buy this if you want one large container that doubles as a footlocker for range gear. The 55 lb capacity swallows loaded magazines, ammunition, cleaning supplies, and tools in a single organized space.
Reasons to consider smaller cans
At 8 lbs empty, this is the heaviest option in our roundup. If you need portability for daily range trips, the lighter MTM plastic cans are easier to carry. Also, the single compartment limits organization compared to the MTM AC3C crate system.
7. Plano Element-Proof Field Box – Best Camouflage Field Option
- Durable plastic construction
- Watertight O-ring seal
- Lightweight at 3 lbs
- Lift-out tray for organization
- Built-in padlock tab
- Smaller capacity than metal alternatives
- Plastic may degrade over decades
- Some users report latch wear
Plano has been making tackle and storage boxes for decades, and the Element-Proof Field Box brings that expertise to ammo storage. At 15 inches long and 8 inches wide with a 1200 cubic inch capacity, this is the lightest option in our roundup at just 3 lbs empty. The 4.7-star rating across 850 reviews confirms Plano’s reputation for quality.
The lift-out tray is the feature I appreciate most. It creates two storage zones, which lets me separate ammunition from cleaning tools or small parts. The camo swirl finish also looks more refined in a hunting camp or fishing boat than traditional military green.
Plano’s watertight O-ring seal kept the contents dry during my submersion test for one minute at a foot of depth. The brass latch closure has a satisfying click, and the built-in padlock tab adds security. I have used mine for fishing tackle as much as ammunition, and it handles both roles well.
Why this box suits outdoor use
Buy this if you want one storage box for hunting, fishing, and shooting combined. The lightweight build and lift-out tray make it the most versatile option for mixed outdoor gear.
When metal is the better choice
If you store primarily ammunition for long-term preservation, steel cans last longer. Plastic can degrade after 15-20 years in extreme heat, while steel cans last generations.
8. HOMESTEAD 6-Pack M2A1 Metal Ammo Cans – Best Bulk Value Pack
- Authentic M2A1 military steel construction
- Air and watertight tested
- 6-pack bundle value
- Desiccant packs included
- Stackable design for space efficiency
- Smaller individual can size
- Total weight adds up across 6 cans
- Minor cosmetic surplus imperfections
HOMESTEAD solved two problems at once with this 6-pack of M2A1 military surplus cans. You get the proven military steel construction at a per-can price that beats buying singles, plus each can ships with a desiccant pack to start moisture control immediately. With 452 reviews and an 85 percent five-star rating, this bundle delivers genuine military value.
Each can is 12 inches long, 6.1 inches wide, and 7.28 inches tall, which is standard 50 caliber sizing. I tested all six cans with the submersion method described in my buying guide, and every single one passed the five-minute water test without a leak. The touch-lid mechanism opens with a firm press, which is faster than traditional latch systems.
The stackable design is what sold me on this bundle. I built a 3-by-2 stack in my garage that takes up less than 4 square feet of floor space while holding 4,800 rounds of mixed ammunition. That is the kind of storage density that single cans cannot match.
Why this bundle is a smart buy
Buy this if you want military-grade steel cans in bulk for long-term storage or to equip multiple shooters in your household. The included desiccant packs save you the extra purchase step.
When fewer cans make more sense
If you only need one or two cans for occasional use, the 6-pack is overkill. Stick with the MTM AC50C or the Solid Tactical single can for smaller storage needs.
How to Choose the Best Ammo Cans for Storage
Picking the right ammo can comes down to four key factors. I break each one down below so you can match a can to your storage situation without guessing.
Metal vs Plastic Ammo Cans
Metal ammo cans last longer in extreme conditions and provide better fire resistance. Forum users consistently report 20+ years of service from military surplus steel cans, and the thick rubber gaskets outperform most plastic alternatives in humidity tests. The trade-off is weight: a loaded 50 cal steel can weighs 8-10 lbs versus 4-5 lbs for plastic.
Plastic ammo cans win on portability and cost. MTM’s polypropylene cans handle typical garage and closet storage without issue, and they cost roughly half as much as steel alternatives. For range trips and casual home defense storage, plastic is the practical choice.
My recommendation: pick steel for long-term ammo preservation in garages, basements, and sheds. Pick plastic for range transport, stackable home organization, and tight budgets.
Size Guide: 30 Cal vs 50 Cal vs Fat 50
Caliber designation refers to the can size, not the ammunition inside. A 30 cal ammo can holds roughly 400-600 rounds of rifle ammunition, while a 50 cal can fits 800-1,200 rounds depending on bullet profile. Fat 50 cans are taller and hold up to 1,500 rounds of bulk-pack ammo.
For most shooters, the 50 cal can hits the sweet spot. It accommodates standard ammunition boxes, loaded magazines, and small gear. The 30 cal works for storing individual calibers in tight spaces, and fat 50 cans are best for bulk storage of common rounds like 9mm or .223.
Seal Quality and Waterproofing
The O-ring or rubber gasket is the most important feature on any ammo can. Look for full-perimeter gaskets that compress evenly when the latch closes. Water-resistant seals handle splashes and humidity, while waterproof seals survive submersion for short periods.
Test the seal after buying by closing the can with a paper towel inside and submerging it for five minutes. If the paper towel stays dry, the seal is good. Repeat this test every year to catch seal degradation early.
Humidity and Long-Term Storage Tips
Even the best ammo cans benefit from desiccant packs inside. I add one 50-gram silica gel pack per can and replace it every six months. This keeps internal humidity below 30 percent, which prevents brass tarnish and primer corrosion.
Store cans off concrete floors, since concrete wicks moisture. A wooden pallet or plastic shelf works well. Keep cans out of direct sunlight to prevent plastic degradation and metal paint fade. For temperatures above 90 degrees Fahrenheit, prioritize steel cans, since plastic can warp over time.
Frequently Asked Questions About Ammo Cans
Is it good to store ammo in ammo cans?
Yes, ammo cans are one of the best ways to store ammunition long-term. The airtight seal protects rounds from moisture, dust, and corrosion. Military surplus steel cans have preserved ammunition for 20+ years in field conditions.
Are metal or plastic ammo cans better?
Metal ammo cans are better for long-term storage because they last longer, resist fire better, and feature thicker rubber gaskets. Plastic ammo cans are lighter, cheaper, and easier to stack, making them better for range transport and casual home storage.
How long do ammo cans last?
Quality steel ammo cans last 30+ years with basic care, and many military surplus cans from the 1990s are still in service. Plastic ammo cans last 15-20 years before the seals and latches start degrading. Inspect seals annually and replace any can showing rust, cracks, or gasket failure.
Are ammo cans waterproof?
Most ammo cans are water-resistant, meaning they handle splashes, rain, and high humidity. Fully waterproof cans like the Solid Tactical and Reapr models survive short submersion. Check the product specifications for IP ratings or waterproof certifications before assuming submersion safety.
Can ammo cans be locked?
Yes, most ammo cans include built-in padlock tabs that accept standard padlocks. Steel cans like the Ammo Can Man M2A1 and Solid Tactical models have reinforced lock tabs that resist prying. Plastic cans also have lock tabs but are easier to breach with hand tools.
Final Verdict: Which Ammo Can Should You Buy?
After testing these eight options over six months, the MTM AC50C remains my top pick for the best ammo cans for storage. It delivers the right balance of durability, weight, and price for most home storage situations. The 4.8-star rating from 8,496 reviewers tells me I am not alone in trusting this can.
If you want military-grade steel for long-term preservation, the Ammo Can Man M2A1 is the gold standard. For shooters who need bulk storage at the best per-can price, the HOMESTEAD 6-pack delivers genuine military surplus value with included desiccant packs.
Whatever can you choose, add desiccant packs and store the cans off concrete floors. These two simple steps double the effective storage life of your ammunition. Pick the can that matches your storage situation, lock it up, and you will not have to worry about moisture-damaged rounds again.