This Glock Bloodline barrel is designed to work with Glock 17 pistols, generations 1 through 4. Although this is a simple to accomplish user friendly swap, they still encourage you to consult a local gunsmith should you have any questions about installation. This barrel is rated for use with SAAMI approved, factory new ammunition. The Rosco Manufacturings line of Glock barrels are a drop-in, match grade option that enhances the accuracy and performance of any stock Glock pistol. All Bloodline Glock barrels are made from 416R stainless steel, broached, honed, polished, and then melonited.Features :"4.49" Over All Length"416R Stainless Steel, Melonite Finish, Nitride Black1:10 TwistFits Glock 17, Gen 1 - 4