Colt M4 Carbine roll marked lower (pre-owned)

Pre-owned in excellent condition. Complete (minus stock) Colt lower taken from a 2016 time frame Colt 6920 rifle. Roll-marked text and logo, H buffer, 4 position Colt receiver extension, square staked castle nut, "F" marked A2 grip (grip has a hole drilled in the back, see pic), "S" marked safety and hammer all indicate that this is all Colt and has not been changed from factory configuration.