AR Parts in 5.56x45mm NATO

SLR Rifleworks Premium Bolt Carrier Group Black Nitride - 556

LMT Defense Full-Auto Piston 5.56 Bolt Carrier G2

Colt Mil-Spec AR-15 Bolt Carrier Group 5.56x45mm NATO Matte Black

Colt Assembled AR-15 Upper Receiver Aluminum Black

Colt's Manufacturing Mil-Spec Bolt Carrier Group 223Rem/556NATO - Black

Centurion Arms RECCE 5.56 NATO 1:7 R5 416R Stainless Steel Mid-Length Barrel - 14.5

Centurion Arms MK12 18" 5.56 NATO 1:7 R5 416R Stainless Steel Rifle Length Barrel

Centurion Arms Midweight Hammer Forged 5.56 Carbine Barrel - 10.3"

Centurion Arms Hammer Forged 5.56 Lightweight Mid-Length Barrel - 16"

Centurion Arms Hammer Forged 5.56 Mid-Length Barrel - 14.5"

Centurion Arms Hammer Forged 5.56 Carbine Barrel - 12.5"

Centurion Arms Hammer Forged 5.56 Carbine Barrel - 11.5"

Centurion Arms AR-15 CM4 Forged 5.56 Stripped Thermal Fit Upper Receiver

Centurion Arms C4 5.56 M16 Bolt Carrier Group

Centurion Arms AR-15 5.56 Chrome Carrier - Sand Rail Cut

Ar-15/M16 Gen 3 Ambidextrous Charging Handle - Ar-15/M16 Gen 3 Ambidextrous Charging Handle Tan

Ar-15/M16 Gen 3 Ambidextrous Charging Handle - Ar-15/M16 Gen 3 Ambidextrous Charging Handle 5.56

Aero Precision AR-15 Barrel 5.56x45mm NATO 16" Government Contour 1:7 Twist

Aero Precision AR-15 Barrel 5.56x45mm NATO 14.5" Government Contour 1:7 Twist

DPMS M-LOK TPR A3 Upper 20" 5.56/223 Rem 30rd

DPMS LBR, Muddy Girl Camo, A3 Upper

DPMS Complete Upper Barrel Assembly 556 Nato LBR 60583

DPMS 223 A3 20-inch HBAR Barrel Assembly

DPMS 5.56 Fire Control Group Retail Pack