6MM ARC

The 6 mm Advanced Rifle Cartridge (6×38mm), or 6mm ARC for short, is a 6mm (.243) caliber full-power rifle cartridge introduced by Hornady in 2020, as a low-recoil, high-accuracy long-range cartridge designed for the AR-15 platform.  All you need is a new barrelmagazine and bolt to convert AR-15 5.56/.223 rifle into the 6mm ARC. The 6mm ARC utilizes the same bolt head size as the 6.5mm Grendel, and 6.5mm Grendel AR-magazines have also been used successfully with the 6mm ARC.

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  • AR-15 18″ 6MM ARC Match Grade Stainless  Upper Assembly / Rocket Man
    The Moriarti Armaments AR-15 AR-15 8″ 6MM ARC Match Grade Stainless  Upper Assembly / Rocket Man comes complete with a MATCH GRADE Stainless Steel 416R Barrel, low profile Steel .750  tunable gas block and a Stainless Steel X-Large Gas tube. Upper is finished off with a..
    The Moriarti Armaments AR-15 AR-15 8″ 6MM ARC Match Grade...
    $599.95$699.95
  • AR-15 21″ 6MM ARC Match Grade Stainless Steel HBAR Upper Assembly
    The Moriarti Armaments AR-15 21″ 6MM ARC Match Grade Stainless Steel HBAR Upper Assembly comes complete with a MATCH GRADE Stainless Steel 416R Barrel, low profile Steel .875 Gas Block with Nitride Finish and a Stainless Steel Gas tube. Upper is finished off with a Free Float MLOK Handguar..
    The Moriarti Armaments AR-15 21″ 6MM ARC Match Grade Stainless...
    $699.95