This AR-15 16" Government Profile Nitride 9mm barrel has a blowback gas system with a 1:10 twist. Our AR-9 parkerized rifle barrels are made from the finest 4150 Chrome Moly Vanadium and precisely rifled for high accuracy at a great price.
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.