Caliber: 5.56 NATO, 223 Wylde chamber. The receiver set is machined from high-grade 7075-T6511 billet aluminum. Ambidextrous charging handle, Watchtower safety selector. Hiperfire EDT2 Heavy Gunner trigger, a single-stage semi-auto LE/SWAT AR style. Tru-Black PVD-coated 5.56 NATO M16-profile MPI-tested Durabolt BCG. 16" 5.56 NATO cold-hammer-forged or 223 Wylde stainless-steel barrel with a 1:8" rifling twist. Mid-length gas system, 13.7" S7M free-floating handguard with M-LOK attachments at five positions, 4 QD points, full-length 1913 Picatinny rail. Flat Face compensating muzzle brake finished in Tru-black PVD coating. B5-reinforced polymer pistol grip and buttstock. 7 lbs. CQB has a 10.5" barrel + $125. Lifetime warranty.