This Bear Creek Arsenal 9mm 16″ M4 profile, black nitride barrel has a blowback gas system with a 1:10 twist. Our AR-9 black nitride barrels are made from the finest 4150 Chrome Moly Vanadium and precisely rifled for high accuracy at a great price. Use a Bear Creek Arsenal 9mm barrel in your next pistol caliber carbine build and experience superior performance backed by a lifetime warranty!

All finished barrels go through a 100% inspection process. Inspections Equipment includes CMMs and Air Gauges for the bores as well as visual and machine inspection.