Phase 5™ introduces the AR type Pistol Barrel in 7.5″. This precision air-gauged barrel is heat-treated fully then thermo stress-relieved for optimum durability and performance. We have assembled these barrels with precision ground Electroless Nickel (EN) coated extensions with Mil-Spec M4 feed ramps for best performance.
Chambered for 5.56mm NATO round
Threading: Mil-Spec ½ x 28