Chambered for the 9X19mm cartridge with a 1:14" 6 groove twist. Made from 4140 steel heat treated to RC 25-32. Features a fully machined one-piece barrel extension. Muzzle threads are 1/2"-36. Barrel is designed to fit a 0.750" gas block.
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This 9mm, 5.5" barrel is the perfect length for an AR-9 short pistol or sbr! I've put 300 rounds down it with decent groups at 10-15 yards and no miss fires or problems.