Diamondback Firearms OEM Replacement Barrel FN Herstal M16 5.56x45mm NATO 16in Heavy Profile Carbine Length 1-8 Twist Non-Threaded 4150 CrMov Black. 56x45mm NATO 16" Carb - Replace your barrel or finish your build with this 16" black nitride barrel...
Diamondback Firearms OEM Replacement Barrel FN Herstal M16 5.56x45mm NATO 16in Heavy Profile Carbine Length 1-8 Twist Non-Threaded 4150 CrMov Black. 56x45mm NATO 16" Carb - Replace your barrel or finish your build with this 16" black nitride barrel...