Machined from certified 416R stainless steel and finished in Isonite QPQ black, this StormLake 4.49", for GLOCK 22, 9x19mm Conversion Barrel is match grade with full case support. The barrel is hardened to 40-42 HRC, rifled to shoot jacketed or lead bullets and guaranteed to function with new manufacture ammunition. Providing caliber flexibility this StormLake barrel facilitates training by allowing lower cost and lower recoil 9mm Luger ammunition to be used. All StormLake barrels are proudly made in the USA and designed for easy, drop in installation. However, occasional minor fitting may be required. For any warranty or product issues and concerns StormLake requests to be contacted directly at 865-988-8933.