AR Parts in 5.56x45mm NATO

Brn 16a2 Upper Receiver - Brn-16a2 5.56x45 Nato 20'''' Bbl Upper Receiver

Brn-16a4 Complete Upper Receiver - Brn-16a4 5.56x45 Nato 20'''' Bbl Upper Receiver

Brn-773 Upper Receiver - Brn 733 C7 5.56 Upper Receiver, 11.5'''' 1-7 Twist Black

Brn-601(R) Retro Complete Upper Receiver - Brn-601 5.56mm 20'''' Bbl Upper Receiver

Ar-15 Chrome Lined Government Barrel Assemblies - Brn Ar-15 A2 Barrel Group 20'''' 1-7 Twist, Rifle Gas

Ar-15 Chrome Lined Government Barrel Assemblies - Brn Ar-15 5.56 Socom Barrel Group 16'''' 1-7 Twist,Carbine Gas

Ar-15 Chrome Lined Government Barrel Assemblies - Brn Ar-15 5.56 Socom Barrel Group 14.7'''' 1-7twist,Carbine Gas

Ar-15 Chrome Lined Government Barrel Assemblies - Brn Ar-15 5.56 M4 Barrel Group 16'''' 1-7 Twist, Carbine Gas

Ar-15 Chrome Lined Government Barrel Assemblies - Brn Ar-15 5.56 M4 Barrel Group 14.7'''' 1-7 Twist, Carbine Gas

Ar-15 Chrome Lined Government Barrel Assemblies - Brn Ar-15 5.56 M4 Barrel Group 11.5'''' 1-7 Twist, Carbine Gas

Ar-15 Chrome Lined Government Barrel Assemblies - Brn Ar-15 5.56 Mk18 Barrel Group 10.3'''' 1-7 Twist,Carbine Gas

Ar-15/M16 Dissipator Barrel 16'''' 5.56 1-8 - 16'''' Lightweight Dissipator Barrel 1-8 Rifle Length 1/2-28''''

Ar-15 Semi-Auto Chrome Bolt Carrier Groups - Ar-15 Semi-Auto Chrome Bolt Carrier Group

Ar-15 5.56 Titanium Bolt Carrier Group Dlc - Ar-15 Titanium Bolt Carrier Group 5.56x45mm Dlc Mp

M16 5.56 Titanium Bolt Carrier Group Dlc - M16 Titanium Bolt Carrier Group 5.56x45mm Dlc Mp

M16 5.56 Lightweight Bolt Carrier Group - Brn M16 Lightweight Bolt Carrier Group Nitride

M16 5.56 Lightweight Bolt Carrier Group - M16 Lightweight Bolt Carrier Group Tin

M16 5.56 Lightweight Bolt Carrier Group - Brn M16 Lightweight Bolt Carrier Group Nickel Boron

M16 5.56 Bolt Carrier Group Chrome Mp - Brn M16 Bolt Carrier Group Mpi Inspect, Chrome, Not Serrated

Ar-15 5.56mm Safety Selector No Tick Mark - Brn Ar-15 5.56mm, Safety Selector No Tick Mark, Black

Ar-15 5.56mm Nato Mk 12 Profile - Brn Ar-15 5.56mm Nato, 18'''' Barrel, 1-7 Twist, Black

Ar-15 20'''' A1 Rifle Barrel 1-7 Assembly - Brn Ar-15/A1 5.56mm 20'''' 1-7 Twist Rifle Barrel Assembly

Ar-15 20'''' A1 Rifle Barrel 1-12 Assembly - Brn Ar-15/A1 5.56mm 20'''' 1-12 Twist Rifle Barrel Assembly

Ar-15 12.7'''' A1 Carbine Barrel Assembly - Brn Ar-15/A1 Carbine 5.56mm 12.7'''' 1-12 Twist Barrel Assembly