18.5 10+1 Flat Dark Earth Stock Permanent Muzzle Attachment Full Length Picatinny Top Rail BUIS w/Tritium front Adjustable Sights 223 Rem/5.56 NATO Maryland/NJ Compliant
16.5 30+1 Flat Dark Earth Stock Gas Piston Syste/Bayonet Lug Full Length Picatinny Top Rail BUIS w/Tritium Front Adjustable Sights 223 Rem/5.56 NATO 1/2x28 Threaded Barrel Model
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
18.5 30+1 Black Stock Gas Piston System Bayonet Lug Full Length Picatinny Top Rail BUIS w/Tritium Front Adjustable Sights 1/2x28 Threaded Barrel Model 223 Rem/5.56 NATO