MTM RS10024 Case-Gard R-100 Multi-Caliber Rifle Ammo Box - Clear Blue, 100-Round Capacity

The MTM Case-Gard R-100 multi-caliber rifle ammo box is a compact, reliable storage solution built for shooters who load, hunt, or run through multiple small-rifle calibers. With 100-round capacity and individual compartments for each cartridge, this clear blue polypropylene box keeps rounds organized and protected, whether you're at the bench, in the field, or stashing spares in your truck. MTM's reputation for tough ammunition storage stands on solid engineering—their ammo boxes are trusted by reloaders and shooters worldwide.

Built from polypropylene that resists warping, cracking, and the wear that softer plastics surrender to over time, the R-100 is designed to last. The flip-top design with a mechanically-engineered hinge handles repeated opening and closing—MTM rates it for 1 million cycles or 25 years, whichever comes first. A snap-lock latch keeps the lid secure so your rounds stay put during transport or storage, and the individual compartments prevent tumbling and mixing.

This box accommodates a wide range of small-rifle cartridges, from varmint rounds like .17 Fireball and .204 Ruger through common centerfire loads like .223 Remington, 5.56x45, .300 Blackout, and .350 Legend, up to less common or specialty rounds. The maximum overall length of 2.65" covers most standard and magnum small-rifle cartridges. A label slot built into the box lets you log load data, powder charge, or batch notes—invaluable if you reload or test different loads.

Key Features

• 100-round capacity with individual compartments for each cartridge
• Durable polypropylene construction resists warping, cracking, and weathering
• Mechanical hinge rated for 1 million open-close cycles or 25 years
• Snap-lock latch prevents accidental spills during transport
• Load label included for recording cartridge specs and test data
• Fits small-rifle calibers including .223 Rem., 5.56x45, .300 Blackout, .350 Legend, and others up to 2.65" OAL

Specifications

Frequently Asked Questions

What rifle calibers does the R-100 hold?

The R-100 is designed for small-rifle cartridges with an overall length up to 2.65 inches. This includes .223 Remington, 5.56x45 NATO, .300 Blackout, .350 Legend, .204 Ruger, .17 Fireball, .222 Remington, and many other common and specialty small-rifle rounds. If you're unsure whether a specific load fits, measure the OAL of your cartridge against the 2.65" maximum.

Is the R-100 good for reloaders?

Yes. The individual compartments prevent loaded rounds from mixing or rolling, and the included load label lets you record your powder charge, primer, bullet, and brass data. This makes it easy to organize different loads and retrieve notes on what worked at the range.

How durable is the MTM Case-Gard box?

MTM uses polypropylene that resists warping, cracking, chipping, and expansion or contraction from temperature changes. The mechanical hinge is rated for 1 million open-close cycles or 25 years of use, and the snap-lock latch secures the lid so rounds won't spill during transport or storage.

What comes with the ammo box?

The R-100 includes the box, hinged flip-top lid, snap-lock latch, and a load label for recording cartridge and load information.