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 roundThreading: Mil-Spec ½ x 28
1:7 Twist

Electroless nickel coated extension – Extensions are precision-ground for maximum accuracy then EN coated for superior wear resistance and extended use.

Mil-Spec manganese phosphate finish – Classic finish helps prevent rust, adds visual appeal and ensures aesthetic compatibility with a wide range of weapons.