MTM 50 BMG Ammo Box 20 Rounds Black

The MTM 50 BMG Ammo Box 20 Rounds Black is a purpose-built storage solution for .50 BMG and .416 Barrett cartridges, engineered to secure and protect the largest rifle ammunition in circulation. This molded polymer box holds 20 rounds in the bullet-up position, with each cartridge seated and supported by military-specification foam that grips the round by the base—the most stable carry orientation for these heavy magnum rounds.

The design accommodates cartridges with a maximum overall length of 4.9 inches and a bullet diameter of .82 inches, making it compatible with standard .50 BMG loads as well as alternative large-bore rounds. A water-resistant O-ring seal keeps ammunition dry during storage and transport, critical for corrosion prevention in precision rifle ammunition where case integrity directly affects accuracy. The stackable construction allows efficient storage of multiple boxes, while the dual padlock tabs and integrated carrying handle enable secure transport to the range or field. At 6.5 x 4.25 x 8.25 inches and weighing 0.67 pounds when loaded, the box fits standard equipment bags and ammo cans without adding excessive bulk.

This storage box addresses a genuine operational need for long-range shooters, precision rifle instructors, and .50 BMG enthusiasts who require organized, secure ammunition management. The MTM brand has established itself as a reliable source for ammunition storage across multiple calibers, and this model specifically targets the niche but dedicated community working with ultra-magnum rifle rounds. Whether managing ammunition for a training evolution, range day, or inventory control, this lockable box provides the structural integrity and protection that expensive .50 BMG loads demand.