Forged 7075 T6 aluminum upper receiver. 15 inch Lo-Pro Slope Nose (LPSN15) Quad Rail with True Fit Technology. Sixteen inch 4150 chrome lined, 1:8 twist, button rifled, M4 extension/M4 feed ramps with mid length gas systems and lo-pro gas block. M16 bolt carrier group black phosphate finish and chrome lined. Ambidextrous Battle Latch Charging Handle Assembly (ABL/CHA). A.R.M.S. 71L Flip Up sight set.