AR Parts in 5.56x45mm NATO

10.5" 5.56 Gov / SOCOM Carbine M-LOK AR 15 Complete Upper Assembly

Precision Armament EFAB Hybrid 5.56 Muzzle Brake - Black

Precision Armament M4-72 Severe Duty 5.56 Muzzle Brake - Stainless

AERO Precision 5.56 Bolt Carrier Group No Logo - Black Nitride

10.5" 5.56 NATO 1:7 Twist 4150V Black Nitride Carbine Barrel

A*B Arms Pro 5.56 Bolt Assembly - Nickel Boron

A*B Arms Pro 5.56 NATO Bolt Carrier Group - Nickel Boron

AERO Precision 5.56 Bolt Carrier Group No Logo - Phosphate

Aero Precision 20in 5.56 NATO AR 15 Upper

Centurion Arms C4 5.56 Billet AR-15 Upper Receiver

Centurion Arms CM4 5.56 Forged AR-15 Upper Receiver

Rubber City Armory 5.56 Bolt Rebuild Kit

Rubber City Armory AR-15 Tool Steel Cam Pin

Rubber City Armory Enhanced AR-15 Firing Pin

Rubber City Armory Lightweight AR-15 Titanium BCG w/ Adjustable Gas Key

Rubber City Armory Lightweight AR-15 Titanium BCG

Rubber City Armory Low Mass Competition AR-15 BCG w/ Adjustable Gas Key

Rubber City Armory Low Mass Competition AR-15 BCG

Rubber City Armory Black Nitride+ M16 Bolt Carrier Group w/ Adjustable Gas Key

AR-15/M16 Helical Gas Ring

AR-15 9310 Bolt Assembly - Nickel Boron

Lightweight .223/5.56 Bolt Carrier Group - Nickel Boron

Lightweight .223/5.56 Bolt Carrier Group - Black Nitride

Odin Works 5.56/.223 Barrel Nut