This Glock Bloodline barrel is designed for Glock 43 pistols. Although it is a simple, user-friendly swap to accomplish, they still recommend consulting a local gunsmith if you have any questions about installation. This barrel is rated for use with SAAMI-approved, factory-new ammunition. Rosco Manufacturing’s line of barrels for GLOCK is 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.