18.5 30+1 OD Green Stock Gas Piston System/Bayonet Lug Full Length Picatinny Top Rail BUIS w/Tritium Front Adjustable Sights 223 Rem/ 5.56 NATO 1/2x28 Threaded Barrel Model
16.5 30+1 OD Green Stock Gas Piston System Full Length Picatinny Top Rail BUIS w/Tritium Front Adjustable Sights 223 Rem/ 5.56 NATO 1/2x28 Threaded Barrel Model