AR Parts in 5.56x45mm NATO

Ar-15 M4e1 16'''' Upper Build Kit 5.56mm - Ar-15 M4e1 16 Upper Build Kit 5.56mm

Ar-15 Colt 16 Upper Build Kit 5.56mm - Brn Ar-15 Colt Upper Build Kit, 5.56mm, 16'''' Bbl

Brn-Proto A1 Barrel Stripped - Brn-Proto A1 20'''' Barrel Stripped 1-12 Black 1/2-28

Ar-15 Buffer Tube - Ar-15 5.56mm Rifle Buffer Tube

Ar-15 A1 10.3'''' Carbine Barrel Assembly - Ar-15 A1 10.3 Carbine Barrel Assy 1-7 F-Mark M4 Feedramp

Ar-15 Moe-Sl Furniture Set M-Lok Polymer - Moe Sl Furniture Set M-Lok Mid-Length For Ar-15 Gray

Ar-15 Moe-Sl Furniture Set M-Lok Polymer - Moe Sl Furniture Set M-Lok Mid-Length For Ar-15 Odg

Ar-15 Moe-Sl Furniture Set M-Lok Polymer - Moe Sl Furniture Set M-Lok Mid-Length For Ar-15 Black

Dirty Bird AR-15 5.56/.223/300BLK Bolt Carrier Group - Nickel Boron

Dirty Bird Industries Sand-Cut Bolt Carrier Group .223/5.56 - Chrome

Dirty Bird Industries Sand-Cut Bolt Carrier Group .223/5.56 - Black Nitride

Dirty Bird 20" M16A1 Enhanced 5.56 Retro Upper Assembly - No M4 Feed Ramps

M16A1 Assembled Upper Receiver - Without M4 Feedramps

M16A1 Stripped Upper Receiver - Without M4 Feedramps

Dirty Bird 16" Side-Charging 5.56 NATO Govt M-LOK Complete Upper

Dirty Bird AR-15 5.56/.223/300BLK Bolt Carrier Group Phosphate/Chrome-Lined

14.5" Pin & Weld 5.56 Mid-length Magpul MOE SL AR15 Upper

M16 Bolt Carrier Group - Polished Nickel Boron

Dirty Bird Industries 7.5" 5.56 DRP Pistol M-LOK V2 Upper Assembly

Dirty Bird 10.5" Government Carbine 5.56 M-LOK Upper Assembly - V3, FDE

Dirty Bird 10.5" Government Carbine 5.56 M-LOK Upper Assembly - V3, Black

Dirty Bird 10.5" Government Carbine 5.56 M-LOK Upper Assembly - V2, Midnight Bronze

Dirty Bird 10.5" Government Carbine 5.56 M-LOK Upper Assembly - V2, FDE

Dirty Bird AR-15 SMRS Handguard - Slim M-LOK Rail System V3 - 15, Black