7075-T6 forged aluminum upper receiver; 16" 5.56 NATO, cold hammer forged, Optimal profile barrel with mid-length gas system; Chrome lined to M249 SAW specifications; 1/2x28 thread pitch with a 1:7 twist rate; M4 feed ramps; Pinned A2 front sight base; Mid-length handguard; Standard charging handle; Phosphate coated, M16 cut, complete bolt carrier group; BCG high pressure tested and magnetic particle inspected