FightLite MCR AR-15 Adjustable Heavy Barrel 5.56 NATO - 16.25" | 1:7 Twist | Mag Phosphate Finish | Mid-Length Gas System

> 5.56 NATO chamber > Length: 16.25" > Heavy Profile for Sustained Fire Use > Thread Pitch: 1/2-28" TPI > Twist: 1:7 RHT > Mid-Length Gas System > 4 Position Adjustable Regulator > Mag Phosphate Finish > Works with MCR and Shrike 5.56 rifles and upper receiver assemblies. > Made In USA