Diamondback Firearms 5.56x45mm NATO 5.50" Pistol-Length Barrel, Black Nitride - 556P55H50B8R

This Diamondback Firearms barrel is chambered in 5.56x45mm NATO with a 5.50" pistol-length profile and 1:8" twist rate. Constructed from 4150 chrome moly vanadium steel with black nitride finish for corrosion resistance and durability. Features a heavy profile design suitable for AR-15 platforms and direct installation into compatible upper receivers.