AR Parts in 5.56x45mm NATO

Dirty Bird 20" M16A2 Enhanced AR 15 Retro Upper Assembly - Chrome-Lined

M16A1 Stripped Upper Receiver - M4 Feedramps

M16A1 Assembled Upper Receiver - With M4 Feedramps

Dirty Bird 7.5" Pistol 5.56 M-LOK AR-15 Complete Upper Assembly - Midnight Bronze

Dirty Bird 7.5" Pistol 5.56 M-LOK AR-15 Complete Upper Assembly - FDE

Dirty Bird 7.5" Pistol 5.56 M-LOK AR-15 Complete Upper Assembly - Black

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

Dirty Bird Industries Enhanced Bolt Carrier Group .223/5.56 - DLC

Dirty Bird Industries Enhanced Bolt Carrier Group .223/5.56 - TiN

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

16" 5.56 Premium Rifle Build Kit W/13" M-Lok Handguard

16" 5.56 NATO Cold Hammer Forged Rifle Build Kit

Rosco Manufacturing Bloodline 16" 5.56 Government 1:7 Twist Black Nitride Midlength Barrel w/ FSB

AR-15 .223/5.56 Bolt Carrier Group - DLC

Rosco Manufacturing Bloodline 14.5" 5.56 M4 1:7 Twist Black Nitride Carbine Barrel w/ FSB

8" Pistol 5.56 Stainless M-LOK Upper Assembly

10.5" 5.56 Stainless Steel Carbine 1:7 Medium Barrel

2A Armament Palouse-Lite 16.5" 5.56 NATO Complete Upper

11.5 5.56 NATO 1:7 Twist 4150V Black Nitride Carbine Barrel

A*B Arms AR-15/M16 Bolt Carrier Group Small Parts Kit

A*B Arms AR-15 Lower Parts Kit

10.5" 5.56 NATO Pistol AR-15 Complete Upper Assembly

Colt's Manufacturing LE6920 AR 15 5.56 NATO Complete Upper

LBE Unlimited AR-15 5.56/.223 Bolt Carrier Group - Phosphate