ALPHA MUNITIONS 6MM ARC BRASS The 6mm ARC (Advanced Rifle Cartridge) is a 6mm (.243) caliber rifle cartridge known for its high accuracy, low recoil, and long-range performance, designed to fit within an AR-15 platform. It offers superior ballistics to 5.56 NATO, with enough power for hunting and match shooting out to 1,000 yards or more, while maintaining a low recoil similar to 5.56. The Alpha 6 ARC brass uses Small Rifle primers and ships in 100 count custom Alpha Munitions plastic cases with perforated bi-layer foam for protection of cases during shipping and can be used for loaded ammunition. Each 6 ARC case produced by Alpha Munitions als Mfg: Alpha Munitions