Glock 43 barrel: This Glock Bloodline barrel is designed to work with Glock 43 pistols. Although this is a simple to accomplish user friendly swap, we 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. Any catastrophic damage/failure caused to product by improper installation, use of reloads, or non-SAAMI approved ammunition will not be covered by the factory warranty. Compatible with Glock 43 and Glock 43X No gunsmith fitting required. Made in the USA, the Rosco way! Specs: Barrel Length 3.4" OAL ( Non-Threaded ) Barrel Material 416R Stainless Steel Barrel Caliber 9x19mm Twist 1/10 RH Barrel Crown Recessed with a 50/50 surface split Barrel Finish Melonite (Electro bore polished) Rifling Pulled Broach Thread Pitch N/A - Non Threaded