5.56 NATO cal., AR-15 style, GIO, aluminum flat-top A3 upper receiver, aluminum forged lower receiver, 10 1/2 in. carbine length barrel with Carlson Comps TAC brake, 10 1/2 in. modular rail system with full-length top Picatinny rail, two 3 in. and one 5 in. rail sections, M4 feed ramps, 30 shot detachable mag., Black Forge winter trigger guard, single stage trigger, Magpul Industries or U.S. Palm Battle grip, investment cast fire controls, Carpenter M16 LEO BCG, Black Forge Niphos coating, hardcoat anodized matte black finish.