Caliber: 5.56 NATO. SOLGW Liberty Fighting Barrel, 1/2-28 threaded muzzle. .750” Gas Block Journal with appropriately sized gas port, DLC-coated M4 feed ramp extension. Liberty charging handle (ambi), mid-length Melonited stainless-steel gas tube. 10.5” or 13” EXO3 rail with QD sling mount. SOLGW phosphate-coated C158 bolt with mil-spec carrier group. Forged lower receiver, Mil-Spec 7075-T6 aluminum, black anodized finish, A5 with A5H2 buffer and appropriate spring. Quick-detach end plate with properly staked mil-spec castle nut. Liberty Fighting Trigger, mil-spec safety selector, B5 P23 grip; B5 Bravo Stock. One 30-round magazine, Lifetime warranty. Based in San Antonio, Texas.