.450 Bushmaster Barrel is a great option for any AR build! These barrels are precision machined from a 4150 Mil-Spec steel blank with a 1:24 twist. It is double stress relieved before rifling and thermally stress relieved after to ensure the best possible accuracy and performance. Precision machining and production ensure the correct component interface. These standards ensure the highest quality and longest life from your new barrel. Guarantee 1MOA groups at 100 yards when observing proper shooting techniques and using high quality ammunition.
AR-15 .450 Bushmaster 18" steel black nitride upper assembly, This drop-in .450 Bushmaster upper will attach to virtually any standard AR-15 lower assembly. Available in 4150 Steel Black Nitride Finish, with 1 and 24" twist and rifle length slim keymod free float handguards. ..AR-15 .450 Bushmaster 18" steel black nitride upper assembly, This ...$389.95$499.95