5.56x45mm NATO Gun Parts

ABC RIFLE COMPANY AR-15 .223 5.56 Complete Build 16in Barrel 15in Lightweight Hybrid M-LOK Handguard Upper Receiver 1-10 Twist 1/2x28 A2 Style Muzzle

ABC RIFLE COMPANY AR-15 .223 5.56 Complete Build 16in Barrel 15in Lightweight Hybrid M-LOK Handguard Upper Receiver 1-10 Twist 1/2x28 A2 Style Muzzle

ABC RIFLE COMPANY AR-15 5.56x45mm NATO 16in Barrel 12in Quad Rail Upper Receiver 1-8 Twist 1/2x28 A2 Style Muzzle Brake Nitride Cerakote Sniper Grey

ABC RIFLE COMPANY AR-15 5.56x45mm NATO 16in Barrel 12in Quad Rail Upper Receiver 1-8 Twist 1/2x28 A2 Style Muzzle Brake Nitride Cerakote Olive Drab

ABC RIFLE COMPANY AR-15 5.56x45mm NATO 16in Barrel 12in Quad Rail Upper Receiver 1-8 Twist 1/2x28 A2 Style Muzzle Brake Nitride Cerakote Flat Dark

Black River Manufacturing SBS Benelli M4/SBE 3 6 Round Magazine Extension Kit OD Green

Black River Manufacturing SBS Benelli M4/SBE 3 6 Round Magazine Extension Kit FDE

Black River Manufacturing SBS Benelli M4/SBE 3 6 Round Magazine Extension Kit Black

Black River Manufacturing Benelli M4/SBE 3 7 Round Magazine Extension Kit Gray

Black River Manufacturing Benelli M4/SBE 3 7 Round Magazine Extension Kit FDE

VKTR Industries VK-1 5.56x45mm NATO 13.7 inch Upper Receiver Heavy Carbine Length 1-7 Twist No Muzzle Device Armor Black

VKTR Industries VK-1 5.56x45mm NATO 13.7 inch Upper Receiver Heavy Carbine Length 1-7 Twist No Muzzle Device Sniper Grey

VKTR Industries 16in VK-1 Complete AR-15 Upper Cerakote Sniper Grey

Harrington & Richardson M16A2 Lower Parts Kit, Gray

CMMG Dissent Mk4 5.56mm 16.1in Upper Group 1-7 Twist 1/2 X 28 TPI .750in 25.5in Midnight Bronze

CMMG UPPER GRP RES MK4 5.56X45 NAT 16.1 TUNG CB2D9AE9 CMM

CMMG UPPER GRP RES MK4 5.56X45 NATO 16.1 TAN 790B3D81 CMM

Fortis Manufacturing Billet Upper Receiver Stripped Black

CMMG Mk4 5.56X45mm NATO Banshee Upper Group Receiver 12.5in Midnight Bronze

CMMG Mk4 5.56X45mm NATO Banshee Upper Group Receiver 12.5in Coyote Tan

CMMG Mk4 5.56x45mm NATO Endeavor Upper Group Receiver 18in Titanium

CMMG Mk4 Endeavor Upper Receiver Group 5.56x45mm NATO 18in Armor Black

CMMG Mk4 5.56X45mm NATO Resolute Upper Group Receiver 16.1in Sniper Grey

CMMG Mk4 5.56X45mm NATO Resolute Upper Group Receiver 16.1in Midnight Bronze