Barrel length 14.5 inches chambered in 5.56 NATO with 1:7 twist and mid-length gas system. M4 barrel extension. Finishes with Geissele MK14 DDC M-LOK handguard, 13.5 inches, and a JMAC KeyMo Mount pin and weld muzzle device. Barrel forged by FN Manufacturing from hammer-forged chrome moly vanadium (Machine Gun Steel). Made for Palmetto State Armory by FN Manufacturing.