Drop-in barrels let you convert your Glock to a different caliber simply by changing the barrel and adding a magazine in the new caliber (available separately). Machined from stainless steel for superior strength, accuracy, and performance. Tight tolerances (+/- 0.001″ to 0.002″) in all critical areas. Cut broach rifling with 1-16″ twist enables shooting of jacketed and lead bullets. Models available for Glock 22, 27, 30 & 35. Magazines indicated in the table below will provide the correct fit with the bottom of the grip frame. Mfg: Storm Lake SPECS: 416R stainless steel, hardened to Rc 40-42, natural finish. 1-16″ twist rifling. May require minor fitting.