6mm ARC

The 6mm Advanced Rifle Cartridge (6mm ARC), introduced by Hornady in 2020, is a low-recoil, high-accuracy 6mm (.243 cal) intermediate rifle cartridge designed to fit in a standard AR-15 platform.Hornady

Key Features
Platform: Fits in standard small-frame AR-15 rifles instead of heavier AR-10/308 platforms.

Weight Savings: Roughly 30% lighter than an AR-10/.308 Win system.
Ballistics: Excellent long-range capability, staying supersonic past 1,000 yards with high ballistic coefficient bullets like the 108-grain ELD-Match.
Recoil: Noticeably lower recoil than a standard .308 Winchester.
Hornady Applications
Long-range match shooting
Medium game hunting (like deer and hogs)
Tactical and multipurpose military or law enforcement use