" 6mm Optimum", a concept of a 6 mm cartridge bridging the gap between the 5.56×45mm NATO and 7.Its in very nice condition with a few minor handling marks. This hard to find little rifle is worthy of my price and will not be sold for less. Several firearm manufacturers have announced that they will be offering factory rifles chambered in the 6mm ARC. Up for sale one last time.no more lowballers please. The 6mm ARC therefore can also be a suitable chambering for shorter "mini-action" bolt-action rifles. The 6mm ARC utilizes the same bolt head size as the 6.5mm Grendel, and 6.5mm Grendel-compatible AR-pattern box magazines have also been used successfully with the 6mm ARC. 223 Rem/ 5.56mm NATO, a new barrel, magazine and bolt are required to convert to the 6mm ARC. Compatibility with the AR-15 įor an ordinary AR-15 rifle chambered for the. With the release in 2020, Hornady also launched three factory loads with 103, 105 and 108 gr (6.7, 6.8 and 7.0 g) bullet weights and advertised G1 ballistic coefficients of.
The cartridge makes use of 6 mm (.243) bullets, which are known for their high ballistic coefficients due to the high sectional density with less drag and better energy retention at extended ranges. The 6 mm Advanced Rifle Cartridge (6×38mm), or 6mm ARC for short, is a 6mm (.243) caliber intermediate rifle cartridge introduced by Hornady in 2020, as a low- recoil, high- accuracy long-range cartridge designed for the AR-15 platform.
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