AR Parts in 5.56x45mm NATO

Ar-15 Trigger Guard Roll Pin - Brn-16 Trigger Guard Roll Pin, 5.56mm

Ar-15 Trigger Guard Assembly - Brn Ar-15 Trigger Guard Assembly, 5.56mm

Ar-15 16'''' A1 Carbine Barrel Assembly - Brn Ar-15/M16a1 Retro Carbine 5.56mm 16'''' Barrel Assembly

Ar-15 12.7'''' A1 Carbine Barrel Assembly - Brn Ar-15/M16a1 Retro Carbine 5.56mm 12.7'''' 1-7 Bbl Assembly

Ar-15 M16a1 Retro Barrel Assemblies - Brn Ar-15/M16a1 Retro Carbine 5.56mm 11.5'''' 1-7 Bbl Assembly

Ar-15 M16a1 Retro Barrel Assemblies - Brn Ar-15/A1 Carbine 5.56mm 11.5'''' 1-12 Twist Barrel Assembly

Ar15 Bolt Carrier Group 5.56x45mm Nitride Mp - Brn Ar-15 5.56mm Bolt Carrier Group, Nitride

M16 5.56 Bolt Carrier Group Nickel Boron Mp - Brn Ar-15/M16 5.56mm Bolt Carrier Group, Mpi, Nickel Boron

Brn-4(R) Complete Upper Receivers - Brn-4 5.56mm 10.4'''' Heavy Bbl Complete Upper W/9'''' Handguard

Brn-4(R) Complete Upper Receivers - Brn-4 5.56mm 10.4'''' Med Bbl Complete Upper W/9'''' Handguard

Brn-4(R) Bolt Carrier Group Phosphate & Chrome - Brn-4 Bolt Carrier Group, Phosphate Chrome

Brn-4(R) Upper Receiver Assemblies With Chrome Lined Barrels - Brn-4 Assembled Upper 14.5'''' Heavy Chrome Lined Barrel Black

Gau-5a 12.7'''' 1-12 Upper Receivers - Brn-Gau-5a Upper Receiver, 12.7'''' 1-12 Twist, Pin/Weld, Black

Xm177e2 Complete Upper Receivers - Brn Xm177e2 Upper Receiver, 11.5'''', 1-7 Twist, Black

Xm177e2 Complete Upper Receivers - Brn Xm177e2 Upper Receiver, 12.7'''' 1-7 Twist, Pin/Weld, Black

Brn16a1(R) 20'''' Complete Upper Receivers - Brn M16a1 Upper Receiver 20'''' Rifle Length, 1-7 Twist, Black

Ar-15/M16 Dissipator Barrel 16'''' 5.56 1-8 - Brn Ar-15/M16 .223 Wylde Chrome Lined Barrel, 16'''' 1-8 W/Fsb

Brn-4 Stripped Barrels Chrome Lined - Brn-4 5.56x45 Nato 14.5'''' Heavy Chrome Lined Barrel Phosphate

Brn-4 Stripped Barrels Chrome Lined - Brn-4 5.56x45 Nato 10.4'''' Heavy Chrome Lined Barrel Phosphate

Brn-15 Upper Receivers 5.56mm Nato - Brn-15 5.56mm 16'''' Bbl .625'''' Gas Block Upper Receiver

Brn-15 Upper Receivers 5.56mm Nato - Brn-15 5.56mm 16'''' Bbl .750'''' Gas Block Upper Receiver

Ar-15 Hybrid 5.56 Barrel - 11.5'''' Hybrid Ar 5.56 Barrel

Taran Tactical GM Interceptor AR15 .223/5.56 Compensator 1/2x28 Thread, 4-Port Design

Gemtech GVAC Complete Upper 5.56 / .223 Rem 11.5 Barrel w/ ETM Flash Hider