COLT COMMANDO SBR 5.56 11.5IN BARREL BLACK WITHOUT BUTTSTOCK HANDGUARD TRIGGER GUARD GAS BLOCK LE6933-OEM2

Ballistic Advantage Performance Barrel 5.56x45mm 13.70", Black - Compact and Efficient Barrel - BABL556036F

Faxon Firearms Mid-Length Button Rifled Gunner Barrel 5.56x45mm 16", Black

Faxon Firearms Carbine-Length Button Rifled Pencil Barrel w/Pinned Gas Block 5.56x45mm 10.50", Black

Timber Creek Rifle-Length SOCOM Barrel 6.5 Grendel 18", Black

Faxon Firearms Mid-Length Button Rifled Pencil Barrel 5.56x45mm 16", Black

Barrage Rifle 9MM 16 inch barrel 30 Round Black with 15 inch Handguard