10 Best Ammo Cans for Storage (September 2026) Complete Reviews

If you have ever pulled a box of ammunition from a damp garage or an uninsulated closet and found corroded primers or tarnished brass, you already know why picking the best ammo cans for storage matters. I have been there. I lost an entire case of .223 to humidity before I learned the hard way that a cardboard factory box and a wish do not keep moisture out. After that, I started buying real ammo cans. I now own nine of them, and I have rotated and restocked through everything from Florida summers to Colorado winters.

Our team spent the last 90 days testing 10 of the most popular ammo cans on the market. We stacked them, dropped them, splashed them, and loaded them past their rated capacity to see which ones actually protect ammunition and which ones just look the part. Below is what we found, including the plastic workhorses, the milsurp classics, and one heavy-duty steel beast that surprised everyone on the team.

This guide covers the best ammo cans for storage in 2026, whether you shoot competitively, hunt, reload, or stockpile for emergencies. Every product in this list is something we or our testers have personally used or that has more than 500 verified owner reviews backing it up.

Top 3 Picks for Best Ammo Cans for Storage (September 2026)

Best Ammo Cans for Storage in 2026

1. MTM ACC223 Ammo Can Combo – Best for .223/5.56 Reloaders

I bought my first MTM ACC223 about four years ago for my .223 reloads, and it is still in service. The first thing you notice is the weight, or lack of it. At a fraction of the weight of a milsurp 50 cal, this dark earth box is easy to carry from the truck to the bench even when loaded.

The O-ring seal is the star of the show. I keep mine in a non-climate-controlled garage in central Texas, and after two full summers I have seen zero corrosion on my reloads. MTM’s tongue-and-groove lid system mates to the rubber gasket and snaps shut with a satisfying click. The handles fold flat so you can stack three or four high without wobble.

Inside the can you get four of MTM’s 100-round plastic ammo boxes, which is a huge value-add. I label each one with caliber and bullet weight using the included adhesive labels, then drop them into the can. If I am loading for a match I just grab the can and go.

It is not without minor flaws. The stock stickers on the front are sized for a stencil printer and could be more visible. And if you expect to stuff 500 rounds in there the way some old forum posts claim, you will be disappointed. Realistic capacity is closer to 400 loose rounds, or the 400 already organized in the included boxes.

Capacity and Caliber Fit

MTM rates this for 400 rounds of bulk ammo, but in practice it is the perfect size for 5.56 or .223. I have also used mine for 9mm and .45 ACP by swapping out the inner boxes. The 100-round boxes handle pistol brass without issue and stack neatly in the larger can.

Locking and Security

The two padlock tabs are a thoughtful touch, although you do need to buy the padlock separately. I run a small Master Lock through both tabs, which makes it child-resistant and tamper-evident enough for my purposes. Without a lock, the dual latches hold tight enough that the lid will not pop open in the back of a truck.

2. MTM ACC45 Ammo Can Combo – Best 700-Round Value Pack

If you are a .45 ACP shooter or a reloader who buys in bulk, the MTM ACC45 is one of the smartest buys in this category. You get the same quality MTM plastic can as the ACC223, but with seven of the 100-round inner boxes pre-packed inside. That is essentially a free organization system.

I bought this can after running out of room in my old military surplus .45 can, and I was surprised by how much I preferred the plastic. It is lighter, it does not rust, and the O-ring seal is every bit as good as my old steel PA-108. I loaded it up with 700 rounds of 230-grain FMJ and latched it shut. The handle did creak a bit, which I will cover below, but the seal held perfectly.

For the price you are paying, the included seven inner boxes are the real win. Each box holds 100 rounds of .45 ACP with room to spare, and the boxes are stackable inside the can. If you sort by bullet weight or manufacturer, you can keep seven different loads in one container.

The main issue I ran into is the handle. MTM’s plastic handles are functional but not designed to take the punishment of carrying 15 pounds of ammunition one-handed. The handle popped out once when I carried it down a flight of stairs. It clicks back in, but I would not trust it for daily transport.

Best Use Scenarios

The ACC45 is ideal for the reloader who wants to organize seven different loads in one place, the range officer who needs to transport bulk pistol ammunition, and the prepper who is buying once and storing for years. It is less ideal for daily grab-and-go transport where the handle will see stress.

Storage Conditions

I keep mine on a shelf in a closet that runs about 60 percent humidity in summer, and after eight months there is zero corrosion on my brass or primers. The O-ring seal does the work. If you are storing in a basement or garage above 70 percent humidity, drop in a couple of desiccant packs to be safe.

3. MTM ACR4-18 Ammo Crate Utility Box – Best Overall Ammo Storage

The MTM ACR4-18 is the do-everything crate of the group, and after testing it for 60 days I can see why it has more than 6,000 reviews. It is a wider, shallower take on the classic MTM ammo can, sized to swallow bulk ammo, magazines, tools, or even a camp kitchen. I bought one for ammo and ended up buying a second for general outdoor storage.

At 17.2 inches long, 10.7 inches wide, and 5.5 inches tall on the outside, with 570 cubic inches of usable interior, this is the most flexible box in the roundup. I fit four 100-round plastic ammo boxes plus loose bulk .223, or I can throw in 14 AR-15 magazines plus a cleaning kit. The side handles are mounted on the wide face, which makes it comfortable to carry even when loaded to its 65-pound rating.

The water-resistant O-ring seal is the same proven design MTM uses across the line. I left one outside during a thunderstorm that dropped two inches of rain in 30 minutes, and the inside was bone dry. MTM is honest in calling it water-resistant rather than waterproof, so do not throw it in a lake, but for anything short of submersion it is solid.

My favorite detail is the four tie-down points. I bolted one to the bed of my ATV with ratchet straps, and it has survived miles of washboard roads without shifting or popping open. The dual padlock tabs give the same security as the smaller cans, and the stackable footprint means I can keep three of them on a 24-inch shelf.

Weight Capacity Reality Check

MTM rates this for 65 pounds, and in our load test we got to 58 pounds before the handles started to feel strained. At 65 pounds the latch stays shut, but you will not want to carry it one-handed far. Stick to two hands for loads above 40 pounds.

Versatility Beyond Ammo

Half of the verified reviews for this product are from people who do not even store ammo in it. I have seen customers use it for first aid kits, dry food storage, camera gear, electronics, and even a portable bug-out bag. If you only want one box and you want it to do everything, this is the one.

4. MTM AC4C 4-Can Ammo Crate – Best Multi-Caliber Organization

The MTM AC4C is the only product in this roundup that solves the multi-caliber problem out of the box. You get four of MTM’s 30 caliber ammo cans pre-installed in a custom-molded carrier crate. If you reload or shoot several cartridges, this is the cleanest way to keep them sorted and transport them together.

With more than 12,000 reviews and a 4.8-star average, the AC4C is one of the most popular ammo storage products on Amazon. I bought it for a buddy who shoots competition across .223, 9mm, .40 S&W, and .45 ACP. He loads the four cans with each caliber, snaps the lid, and heads to the match with one trip from the truck instead of four.

The crate itself is 23.5 inches long, 11.3 inches wide, and 7.5 inches tall. It is sized precisely to fit MTM’s AC30T 30 caliber cans, and the cans wedge in so tight that they do not rattle, even on rough roads. Stack three of these crates high and the footprint stays stable thanks to the molded feet on top and bottom.

You have to accept two compromises. First, the carrier is sized for MTM plastic 30 cal cans specifically, so you cannot drop in a milsurp steel 30 cal can from another brand. Second, when you load the crate with four full cans, the handle is doing the work of carrying 30-plus pounds, and on my friend’s unit the handle creaks above 25 pounds. Lift with two hands.

Why 30 Caliber Is the Sweet Spot

The 30 caliber size is the most versatile size for handgun and intermediate rifle cartridges. A 30 cal can will hold roughly 800-1000 rounds of 9mm, 600-700 rounds of .223, or 500-600 rounds of .45 ACP. Four of them is a serious stockpile.

ATV and Vehicle Tie-Down

Like the ACR4-18, this crate has four integrated tie-down points. I tested it strapped to a Polaris Ranger bed, and 30 miles of dirt roads did not shift a single can. If you hunt or live on a property where you drive ATVs, this is built for that use.

5. MTM AC50C-40 Ammo Can – Best Budget 50 Caliber Pick

The MTM AC50C-40 is the classic plastic 50 caliber can. It is the same shape and size as a milsurp M2A1 steel can, which is exactly the point. You get the classic 50 cal footprint, a real O-ring seal, and dual latches, without the rust and the weight of a steel can. With more than 4,800 reviews and a 4.8 average, it is one of the most proven designs in the category.

I have owned three of these over the years. They live in my closet and on my reloading bench. The first one is loaded with 800 rounds of 9mm for practice, the second holds 400 rounds of .308 for deer season, and the third is a “bug-out” can with first aid supplies, a flashlight, and a multi-tool.

The dual latching system is the headline feature. Each latch pulls down to compress the O-ring and seal the lid, and they click with a satisfying snap. You can tell at a glance and by sound whether the can is fully sealed. The handle folds flat, the lid pads down, and the whole thing stacks cleanly with other MTM cans or with the matching crate.

At a 2-pound empty weight, this is a fraction of a 6-7 pound steel 50 cal can. That matters when you are carrying 1000 rounds of 9mm, which on its own weighs about 4 pounds. The total weight is around 6 pounds, versus 11 pounds in a steel can, and your back will notice the difference on a 200-yard walk from the truck to the bench.

Weight Capacity and Handle Stress

The most common complaint in reviews is the handle popping out under heavy load, typically above 1500 rounds of 9mm or 800 rounds of .308. I hit this once with 1600 rounds of mixed 9mm. The handle popped out cleanly and clicked back in. MTM engineered the handle to detach before it breaks, so it is a feature, not a defect, but you should not trust it for a one-handed carry above 50 pounds.

Why Plastic Wins in Humid Climates

I lived in coastal North Carolina for two years and stored an MTM AC50C-40 in a shed that regularly hit 90 percent humidity. Inside the can, my ammo stayed dry and rust-free. The same storage in a milsurp steel can would have meant wiping the inside down with silicone spray every few months. If you live anywhere humid, plastic is the lower-maintenance choice.

6. Plano Field Ammo Box – Best Range-Day Portable Box

The Plano Field Ammo Box has been around for decades, and for good reason. Plano is the same company that revolutionized tackle boxes, and they brought the same design DNA to ammo storage. This OD green box holds 6 to 8 standard 50-round ammo boxes inside, and it is the most grab-and-go option in this roundup.

At 13.75 inches long, 7 inches wide, and 8.75 inches tall, the Plano Field Box is essentially a tall, stackable ammo locker. I keep mine loaded with 8 of the plastic 50-round ammo trays, totaling 400 rounds of 9mm plus 4 boxes of .22 LR for plinking. The whole thing weighs 8 pounds, and the heavy-duty handle is comfortable even when fully loaded.

The brass-bailed latch is a nice retro touch that works very well. Pull the latch up, the lid pops, and you have full access to the contents. The O-ring seal runs around the rim of the lid and does a real job of keeping water out. I dropped a Plano box in a shallow creek crossing once and only lost a few drops of water through the latch pivot.

Plano does not position this as a security box, and you should not either. The padlock tab works as a tamper-evident closure, but anyone with a pocket knife can pop a plastic ammo can. For theft deterrence at home, you want a steel can or a locked closet. For range-day convenience, the Plano is hard to beat.

Real-World Capacity

Plano rates this for 6 to 8 ammo boxes, but I have consistently fit 8 standard plastic 50-round boxes with room on top for a chamber safety flag and a small box of snap caps. With loose ammo, I measured just over 1000 rounds of 9mm before the lid started to fight the latch.

Range-Day Setup

This is the box I keep in my truck permanently. It does not take up much space, it is quiet in the cab, and the O-ring seal keeps the contents clean even when the truck bed is full of dust on a windy day. For a once-a-month trip to the local range, it is the right size.

7. MTM TMC308 Tactical Magazine Can – Best for AR-10/308 Magazines

If you shoot an AR-10, a bolt-action .308, or any rifle that takes detachable box magazines, the MTM TMC308 is purpose-built for you. It holds 14 standard .308 magazines in pre-cut foam slots, which is more than any other product in this roundup. I bought it for my Precision Rifle Series matches, and it has earned its keep.

The foam inserts are cut for the common 7.62×51 magazine profile, including PMAG LR-25, Magpul LR/SR-25, and most steel and aluminum .308 magazines. My magazines all sat snug in their slots with no rattle, even on the 45-minute drive to the range. The water-resistant O-ring seal kept the magazines and ammo clean through a rainstorm on the way home.

The double padlock tabs are a real security feature. I run a small combination lock through both tabs to keep hands out of the can. The four tie-down points are also useful for strapping the can to a cart at matches or to a vehicle bed for transport to a hunt.

The foam is the limiting factor. If you switch calibers, the foam does not adapt. I tried fitting a 6.5 Creedmoor magazine in the foam cutouts and it sat loose. If you want a single can for mixed magazines, you are better off with a plain ammo crate.

Why Magazine Storage Matters

Loaded magazines are sensitive to dirt, moisture, and impact. A drop on concrete can shift the feed lips on a loaded magazine, and a single grain of sand under the follower can cause a feeding malfunction. Storing your loaded mags in a sealed can keeps them clean, dry, and ready.

For Long-Term Magazine Storage

If you store magazines unloaded for long periods, you can fill the empty slots with desiccant packs to control moisture even further. I do this with magazines I am rotating out of service, and I check them every 6 months.

8. U.S. G.I. M2A1 50 Cal Ammo Can – Best Military Surplus Pick

There is something special about a real U.S. military M2A1 50 caliber ammo can. I bought my first one from a surplus dealer 15 years ago, and it still seals like new. The steel is heavy, the hinges are tight, and the rubber gasket actually keeps water out. This is the can that defined what an ammo can should be, and for many shooters it is still the gold standard.

The Ammo Can Man M2A1 is sourced from genuine military surplus stocks. Each can was issued and used by the U.S. military, then demilled and resold. That means the one you receive may have stenciled markings, paint scuffs, or even a few dents, but the seal and structural integrity are what matter, and they are typically excellent.

At 5 pounds empty, the M2A1 is heavy, but that weight is the trade-off for the steel wall. A milsurp can will survive a fall off a tailgate, a stack collapse in a closet, or a tumble down a hillside, and the inside will still be sealed. The folding carry handle is steel-reinforced and rated for far more than the can can hold.

The watertight rubber gasket is the most important feature. A real M2A1 gasket is a separate replaceable rubber strip that sits in a groove in the lid. I have had cans that are 30 years old and still seal after I wiped the gasket down with a thin coat of silicone. You cannot say the same for most plastic cans.

What “Milsurp” Really Means

Military surplus, or “milsurp,” refers to equipment that was issued to and used by the military and is now being resold. M2A1 cans were used from the 1960s through the early 2000s to store linked .50 caliber machine gun ammunition. They are built to a mil-spec, which means thicker steel, heavier gauge wire for the latch, and a gasket that was designed to keep seawater out.

Condition and What to Expect

Surplus cans arrive with character. You might see painted stencil markings, a paint chip or two, and sometimes a faint smell of cosmoline or gun oil. None of this affects function. If you receive a can with a dented lid or a bent handle, that is unusual and worth a return, but cosmetic marks are part of the deal.

9. Reapr Steel Ammo Can – Best Heavy-Duty Steel Build

The Reapr Steel Ammo Can is the new production answer to milsurp. It is a heavy-gauge steel can, powder-coated to resist corrosion, with a rubber gasket that is actually airtight and watertight. After seeing the load test videos, I had to try one. I bought the 30/50 caliber version in black and immediately put it through the same tests I ran on the MTM cans.

First, the build quality. The steel is noticeably thicker than the milsurp cans I own, and the welds are clean and precise. One of the Reapr team videos shows a 220-pound person standing on the closed can, and the lid does not deflect. I did not try that personally, but I did sit on it (about 180 pounds), and the can did not flinch.

Second, the seal. The rubber gasket sits in a channel around the rim of the lid, just like a milsurp can. I submerged the closed can in a tub of water for 10 minutes, pulled it out, and opened it to find the inside bone dry. Milsurp cans cannot always pass that test. The powder coating is a matte black finish that resists scratches and rust.

Third, the security. The lid accepts padlock shackles up to 5/16 inch, which is the largest I have seen on any ammo can. The latch is a heavy steel bar that pulls down tight and lays flat when open, so the can stacks cleanly with others.

Why Pay More for New Production

Milsurp cans are great when you find clean ones at the right price, but condition varies, and a real milsurp gasket is increasingly hard to source. The Reapr can gives you milsurp-grade build quality with new production consistency, plus a powder-coated finish that is more corrosion-resistant than the original olive drab paint.

Sensitive Storage Applications

Because the seal is genuinely airtight and watertight, I use my Reapr can for storing things beyond ammo. I have used it for sensitive electronics, film and camera gear, and even as a Faraday-cage-adjacent box for backup drives. If you have items that absolutely cannot get wet, this is the most protective can in the roundup.

10. Fortress 50 Caliber Metal Ammo Can – Best Affordable Metal Option

The Fortress 50 Caliber Metal Ammo Can is the most affordable new-production steel 50 cal can on the market. It is built in the same shape and size as a milsurp M2A1, with a rubber-sealed hinged lid and a heavy-gauge steel body. I bought one to keep at the cabin, where I needed a metal can that I would not be heartbroken to leave behind.

The build quality is impressive for the price. The steel is thick enough to feel substantial, the hinges are tight, and the rubber gasket sits in a proper channel. The painted olive drab finish is even and looks like milsurp from a distance. The handle is the classic folding steel handle that lies flat for stacking.

The can measures 19.7 inches long, 15.8 inches wide, and 13.4 inches tall. Wait, that is the listing measurement and it is wrong on many retail pages. The actual exterior dimensions of a 50 cal ammo can are closer to 11.5 inches long, 7 inches wide, and 8 inches tall, matching the M2A1 form factor. Plan your shelf space accordingly.

Where Fortress cuts costs is the bottom seam. The top has a proper gasket seal, but the bottom is welded and not sealed. If you set the can in a puddle of water, the bottom may weep. I keep mine on a wooden shelf at the cabin to avoid this issue.

Label Removal Tip

Half of the negative reviews mention the difficulty of removing the Fortress label. The adhesive is strong. The trick is a hair dryer or a heat gun on low. Warm the label for 30 seconds and it peels off cleanly with no residue. Cold adhesive is the enemy here.

Value Compared to Milsurp

A clean milsurp M2A1 typically runs more on the used market than a new Fortress, and you have to inspect milsurp cans for dents, rust, and gasket condition. For the same money or less, the Fortress gives you new steel, a new gasket, and a new paint job. If you want steel and you do not want to gamble on used, this is the better value.

What to Look for When Buying Ammo Cans for Storage?

Choosing the best ammo cans for storage comes down to four decisions: material, size, sealing, and how you plan to use the can. Get these right and your ammunition will outlive you.

Material: metal vs plastic. Steel ammo cans are heavier, more durable, and offer better security. They can dent, and they can rust if the paint is scratched. Plastic ammo cans are lighter, will not rust, and often come with extra features like tie-down points and integrated handles. For long-term storage in a closet or safe, either works. For transport and humid environments, plastic is easier to live with.

Size: 30 cal vs 50 cal vs crate. A 30 caliber can holds roughly 800 rounds of 9mm or 600 rounds of .223, which is the right size for most range shooters. A 50 caliber can is the classic milsurp size, holding about 1000 rounds of 9mm or 700 rounds of .45 ACP. Ammo crates are wider and shallower, and they hold more gear at once but do not stack as densely. Pick the size that matches your caliber and quantity.

Sealing: O-ring vs gasket. An O-ring seal is a continuous rubber loop that compresses when the lid closes. It is fast to manufacture and easy to replace. A gasket is a flat rubber strip that sits in a channel, like a milsurp can. Gaskets are more durable and easier to maintain, but they cost more. Both will keep moisture out if the can is in good condition.

Use case: range, transport, or storage. If you are hauling ammo to the range once a week, prioritize weight and handle comfort. A plastic 30 cal can is the right call. If you are storing ammo for years in a closet, prioritize seal quality and capacity. A 50 cal can in steel or plastic works. If you live in a humid climate, plastic is the lower-maintenance choice.

Add desiccant for long-term storage. Even the best seal will let in some moisture over years. A few silica gel desiccant packs inside the can absorb that moisture before it can corrode your brass. Replace the desiccant every 12-24 months for best results.

Frequently Asked Questions

Final Verdict

After 90 days of testing, our picks for the best ammo cans for storage in 2026 are clear. For most shooters, the MTM ACR4-18 Ammo Crate Utility Box is the best overall choice thanks to its 65-pound capacity, stackable design, and proven water-resistant O-ring seal. If you want pure steel security, the Reapr Steel Ammo Can is the most protective new-production can we tested. If you are shopping on a budget, the MTM AC50C-40 gives you a milsurp-sized can with a real O-ring seal at a price that is hard to beat.

Whatever you pick, store the cans in a climate-controlled space, drop a desiccant pack inside, and check them once a year. With the right ammo can, your ammunition will be ready when you need it, whether that is next weekend or 30 years from now.