True Precision Non-Threaded Glock 19/19X/G45 Handgun Barrel - Satin Stainless - This non-threaded barrel is easy to install with the drop-in design. This barrel an advanced propietary broach cut design specifically engineered for increased accuracy potential. Fits The Glock 19, 19X, And Model 45 (9mm) Pistols In Gen 1-5 Broach Cut 6 Groove Rifling Allows For All Ammo Types To Be Used Safely, Including Cast Lead 100% Designed And Manufactured In The USA With USA Sourced Certified 416R Stainless Steel 9mm 1/10Rh Twist Rifling Special 11 Degree Competition Style Target Crown For Non-threaded Versions Or 1/2x28 Threads With Included Thread Protector On Threaded Versions Threaded Versions Include Viton High Heat Integral O-ring Lock Thread Protector Fully Supported Saami Spec Chamber Improved Overall Fit From OEM With Added Chamfers, Improved Radius Cuts, And Other Additions For A Better Than OEM Barrel Assorted Specialty Coatings And Finishes To Choose From Lifetime Performance Warranty For Function