AR Parts in 5.56x45mm NATO

Superlative Arms Adjustable Gas Block Bleed Off (Clamp On) - Melonite

Superlative Arms Titanium Adjustable Gas Block Bleed Off (Clamp On) - Grey DLC

Strike Industries T-Bone 223/5.56mm NATO Charging Handle - FDE - Black

Stag Arms AR-15 7.5 5.56 M-LOK Pistol Left-Handed Complete Upper - FDE/Phosphate-Chrome Lined

Stag Arms Stag 15 Tactical Left-Handed QPQ 16 in 5.56 Upper - FDE

Stag Arms Stag 15 Tactical 16 in Upper (Left-Handed Ejection)

Stag Arms AR-15 16" Tactical Midlength Left-Handed Upper Assembly - Black

Stag Arms AR-15 Barrel 5.56x45mm NATO 16" M4 Contour 1:7 Twist Phosphate

Stag Arms Barrel AR-15 Pistol 5.56x45mm NATO M4 Contour 1 in 7" Twist 7.5" Pistol Length Gas Port Chrome Moly Nitride Factory Blemished

Tactical Springs (Sprinco) M4/M16 Extractor Upgrade Kit - Triple Pack

Spinta Precision MK18 5.56 NATO Nitride Barrel - 10.3"

Spikea (TM)s Tactical Honey Badger Semi-automatic Lower/Upper Set 223 Rem/556NATO Tactical Grey

M4-L89 5.56x45 Nato Assembled Upper Receiver - M4-L89 5.56x45 Nato 13.9''''bbl 13.75'''' L89 Rail W/Asr

M4-L89 5.56x45 Nato Assembled Upper Receiver - M4-L89 5.56x45 Nato 13.9''''bbl 13.75'''' L89 Rail W/Nox9

M16 Bolt Carrier Assembly

M4-89 5.56x45 Nato Assembled Upper Receiver - M4-89 5.56x45 Nato 13.7'''' Bbl 13'''' M89 Rail W/Nox Brake

Sons of Liberty Gun Works M4-89 5.56 NATO AR-15 Upper - 10.5"

Sons Of Liberty Gun Works Ambi Charging Handle AR-15

Sons of Liberty Gun Works M4-EXO3 5.56 AR-15 Upper - 10.5"

Ar-15 Sage Dynamics Upper Receiver Assembly 5.56 - Sage Dynamics 5.56x45 Complete Upper 12.5'''' Bbl M76 Rail

Ar-15 Combat Grade Barrels - 5.56mm Nato 14.5'''' Combat Grade Barrel

Ar-15 Combat Grade Barrels - Combat 5.56x45mm Nato 13.7'''' Gov Profile 1/2''''x28 1-7 Twist

M16 Chrome Match Bolt Carrier Assembly - M16 Match Bolt Carrier W/Key

SLR Rifleworks Premium Bolt Carrier Group Titanium Nitride - 556