Getting the right ammo can dimensions matters whether you’re storing ammunition, organizing tools, or building emergency kits. Each military surplus can comes in specific sizes built for different purposes.
Let’s break down the exact measurements and help you pick the perfect storage container for your needs.
Standard Military Ammo Can Sizes and Dimensions
Military-grade ammo cans follow strict U.S. Department of Defense specifications. The welded steel construction uses 1mm thick metal with reinforced corners that handle serious abuse.
Every military ammunition box includes a rubber gasket seal that creates an airtight barrier against moisture. These weatherproof containers keep contents dry even when submerged in water for short periods.
The three main sizes you’ll find are the 30 caliber, 50 caliber, and Fat 50. Each was designed around specific ammunition types used by U.S. forces. The carry handles are load-tested to support fully-packed cans weighing 60+ pounds.
Wall thickness and gasket placement reduce internal space by roughly 0.5 to 1 inch per side. Always check both exterior dimensions and interior capacity when planning storage. The latching mechanism uses a fold-over design that tightens as you close it.
Complete Ammo Can Dimensions Chart
| Can Type | Military Designation | External Dimensions (L × W × H) | Internal Dimensions (L × W × H) | Storage Volume | Empty Weight | Typical Ammo Capacity |
|---|---|---|---|---|---|---|
| 30 Caliber | M19A1 | 10.75″ × 3.5″ × 6.75″ | 10″ × 3″ × 6.5″ | 0.75 cu ft | 3.5 lbs | 840 rounds .30-06 (or ~200–400 rounds 7.62×51 / 5.56 depending on packing) |
| 50 Caliber | M2A1 | 11″ × 5.5″ × 7″ | 10.5″ × 5″ × 6.5″ | 1.3 cu ft | 5.5 lbs | 300–400 rounds .50 BMG (loose or linked) |
| 5.56mm Can | M855 / PA-108 variant | 10.5″ × 6.5″ × 3.5″ | 10″ × 6″ × 3″ | 0.95 cu ft | 4 lbs | 1,000 rounds 5.56 NATO (linked or boxed) |
| Fat 50 | M2A2 / PA-108 “Fat 50” | 12″ × 6.25″ × 7.5″ | 11.5″ × 5.75″ × 7″ | 1.8 cu ft | 7 lbs | 1,500+ rounds (mixed calibers) e.g., 5.56 / 7.62 bulk storage |
Ammo Can Dimensions by Caliber Type
30 Caliber Ammo Can Dimensions
The M19A1 ammo can measures exactly 10.75 inches long, 3.5 inches wide, and 6.75 inches high on the outside. Interior space drops to approximately 10 x 3 x 6.5 inches after accounting for walls.
This compact storage solution holds 840 rounds of .30-06 Springfield or 1,200 rounds of loose 5.56mm NATO. Total internal volume equals 0.75 cubic feet. Empty weight runs about 3.5 pounds.
50 Caliber Ammo Can Dimensions
The M2A1 can provides 11 inches in length, 5.5 inches in width, and 7 inches in height externally. This versatile container became the standard for general military storage.
You get roughly 1.3 cubic feet of usable space inside. It handles 300-400 rounds of .50 BMG or 1,500+ rounds of smaller calibers like 9mm. The wider footprint makes it stable when stacked. Empty weight sits around 5.5 pounds.
5.56mm/.223 Ammo Can Dimensions
The M855 ammunition can uses a unique profile: 10.5 inches long, 6.5 inches wide, and 3.5 inches tall. This low-profile design fits under seats and in tight spaces.
Stripper clip storage works perfectly in this can. You can pack roughly 1,000 rounds of 5.56 NATO or .223 Remington. The flat shape also makes it ideal for range bags and transport. It weighs about 4 pounds empty.
Fat 50 Caliber Can Dimensions
The M2A2 Fat 50 stretches to 12 inches long, 6.25 inches wide, and 7.5 inches tall externally. This high-capacity container maxes out around 1.8 cubic feet inside.
Bulk ammunition storage becomes simple with this size. Store multiple calibers together or use it for non-ammunition items like freeze-dried meals, medical kits, or electronics. Empty weight reaches about 7 pounds.
Choosing the Right Ammo Can Size for Your Needs
Matching Can Size to Storage Goals
Small 30 cal containers excel for single-caliber organization. They’re light enough to carry fully loaded and fit in vehicle trunks easily. One can typically stores enough ammunition for 3-4 range trips.
Medium 50 cal cans balance capacity with portability. Serious shooters prefer these for bulk purchases of popular calibers. The added width prevents ammo boxes from shifting during transport.
Large Fat 50 cans suit preppers and collectors storing diverse items. The extra volume reduces total can count but increases individual weight. Think about frequency of access when choosing size.
Weight and Portability Factors
A fully loaded 50 caliber ammo can tips scales at 55-70 pounds depending on ammunition type. That’s manageable for short carries but exhausting over distance. 30 caliber cans max out around 40 pounds loaded.
Dual-handle designs distribute weight better than single handles. Some shooters use shoulder straps or repurpose old ammo can carriers for easier transport. Consider your physical capability and storage location.
Stackable design lets you build stable towers up to 5 cans high. Place heavier cans on bottom and lighter ones up top. The uniform footprints of military cans create secure stacking patterns.
Military Surplus vs Commercial Options
Genuine military surplus shows wear from actual field use but functions flawlessly. The gaskets might need replacement after decades of service. Surplus pricing runs 30-50% less than new commercial cans.
New commercial ammo cans arrive with fresh paint and perfect gaskets. Quality varies significantly between manufacturers. Some use thinner steel or cheaper latches that fail sooner.
Dimension variations exist in commercial versions. Always verify measurements before buying in bulk. Some brands run slightly smaller to cut costs.
Alternative Uses for Different Ammo Can Sizes
Small Can Applications (30 Cal)
Automotive emergency kits fit perfectly in 30 cal dimensions. Pack jumper cables, flares, first aid supplies, and basic tools. The waterproof seal protects contents from trunk moisture and temperature swings.
Electronics storage keeps expensive gear safe from humidity. Store two-way radios, GPS units, batteries, and charging cables. The metal construction provides electromagnetic shielding as a bonus.
Small parts organization works great for workshops. Sort screws, nails, drill bits, and fasteners by type. The narrow profile fits on shelves better than wide plastic bins.
Medium and Large Can Uses
72-hour emergency kits utilize 50 cal and Fat 50 sizes perfectly. Pack water purification tablets, energy bars, emergency blankets, and fire starters. Add important documents in waterproof bags.
Camping gear storage keeps equipment dry between trips. Store camp stoves, fuel canisters, cooking utensils, and seasoning packets. The rugged exterior survives rough handling in truck beds.
Document protection safeguards vital papers from disasters. Birth certificates, property deeds, insurance policies, and cash stay safe during floods or fires. Add desiccant packets for moisture control.
Conclusion
Understanding ammo can dimensions helps you select the ideal storage solution for ammunition, tools, or emergency supplies. The 30 cal, 50 cal, and Fat 50 sizes each serve specific purposes based on capacity needs.
Choose your ammo can size based on what you’re storing and how often you’ll move it. These military-grade containers deliver decades of reliable protection.
FAQs
What are the dimensions of an ammo can?
Common ammo can sizes include: 30 cal at 10.75″L x 3.5″W x 6.75″H, 50 cal at 11″L x 5.5″W x 7″H, and Fat 50 at 12″L x 6.25″W x 7.5″H. These measurements represent external dimensions including handles and latches.
What are the dimensions of a 556 ammo can?
The 5.56mm ammo can (M855 designation) measures 10.5 inches long, 6.5 inches wide, and 3.5 inches tall externally. This flat ammunition container was specifically designed for AR-15 and M16 rifle ammunition on stripper clips.
What are the dimensions of a 30 caliber ammo can?
The 30 caliber ammunition can (M19A1) has external dimensions of 10.75″ length, 3.5″ width, and 6.75″ height. Interior usable space measures approximately 10″ x 3″ x 6.5″ due to steel wall thickness and rubber gasket seal.
Are all ammo cans the same?
No, military ammo cans come in multiple sizes designed for different ammunition types. The M19A1, M2A1, M2A2, and M855 all feature unique dimensions. Commercial cans also vary in size, quality, and construction from military specifications.
Can I use 20 year old ammo?
Yes, ammunition stored properly in sealed ammo cans remains reliable for 20+ years. Military surplus ammunition routinely functions after decades in storage. Always inspect rounds for corrosion, damaged primers, or split cases before firing.
Burhan Ali is the founder and author of DimensionsChart.com, providing accurate size charts, measurements, and guides for smarter buying decisions.
