This AR-15 16" M4 contour, black nitride 5.56 barrel has a mid-length gas system with a 1:7 twist. Our 5.56 NATO black nitride rifle barrels are made from the finest 4150 Chrome Moly Vanadium and precisely rifled for high accuracy at a great price. Use an NSPEC ar15 barrel in your next AR-15 build and experience superior performance back 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.
