Je Machine Tech Barrel Features The Je Machine Tech Barrel is machined from 4150 chrome moly steel a material chosen in barrel manufacturing for its combination of strength and heat tolerance under repeated firing. Chrome plating on the bore adds a further layer of wear resistance helping the barrel shed fouling more easily and extending its service life between cleanings. A 1:10 twist rate stabilizes a broad range of common 9mm projectile weights giving builders flexibility in ammunition selection. The standard barrel profile keeps the overall build light and well balanced on an AR-15 style platform. Finished in black nitride the barrel resists corrosion and surface wear far better than a bare steel finish making it suited to frequent range use and harder environments alike. The 1/2x36 threaded muzzle accepts a wide range of compensators muzzle brakes and mounting devices letting builders tailor recoil management to their own preferences. At 4.5 inches the barrel is sized for a compact AR-15 pistol build without sacrificing reliable function in 9mm. For anyone assembling or replacing a barrel on a 9mm AR-15 pistol the Je Machine Tech Barrel is a solid option for sale at GrabAGun. JE Machine Tech Barrel Specifications Manufacturer: JE Machine Tech Caliber: 9mm Compatible Hosts: AR-15 Barrel Finish: Black Nitride Barrel Material: Chrome Plated Steel Twist: 1:10 Thread Pattern: 1/2x36 Barrel Description: Standard Barrel Length: 4.5 Available At: GrabAGun