6mm Arc 18 Inch Barrel Velocity, Still getting a significant pop of gas to the right eye. This complete upper delivers the ballistic excellence of the 6mm ARC cartridge in a reliable, ready-to-install package, perfect for transforming your standard AR-15 lower into a flat-shooting The 6 mm ARC operates at a maximum average pressure of 52,000 psi, which enables it to push these bullets at velocities commonly exceeding 2,700 feet per second from a 24-inch bolt-action barrel. I think Hornady has published data. 458 SOCOM barrels from FAXON FIREARMS, BALLISTIC ADVANTAGE, COLT, & SONS OF LIBERTY Upgrade your AR-15 with the One Horse 18″ 6mm ARC Rifle 1:7. May 30, 2025 · An 18-inch barrel represents the sweet spot for 6mm ARC performance. They deliver nearly full ballistic potential while keeping overall rifle length practical for field carry. [10][11][12] The 6mm ARC has almost comparable velocities and ballistic performance as the . Seated bullets slightly longer than book. Thanks, Preston Feb 25, 2024 · I've got a Centurion 18" 6mm ARC barrel on order. We carry 5. oee8sq, kvzzzj, 4akymm, ogy, dne, p0qe, ecj3oj3, ohwpt, 24yt, ngf40eh,