The Tac M4 features CORE15 Mil-Spec Forged 7075-T6 upper and lower receivers chambered in .223/5.56 x 45mm NATO with a Type III Class II Hard-coat anodized finish. The 1913 Picatinny Rail flat top has a dry lube internal finish and laser engraved T-markings.Tac M4 also has a free-floating quad rail, M4 feed ramps, machined chevrons in the front strap and bullet pictogram safety markings. The 16" chrome-lined barrel is made of 4150 chrome moly vanadium with an M4 Profile and a 1:7 twist. The Tac M4 also has a Direct Gas Impingement Gas System, gas tube made of 304 grade stainless steel, chrome-lined steel bolt carrier and bolt carrier key, Magnetic Particle Inspected (MPI) bolt assembly, and an A-2 flash hider. It features Magpul MOE MBUS rear sight, six-position stock, pistol grip, and PMAG.The Tac M4 is available in all black or with OD furniture.