Zaffiri Precision Threadless Comp with Barrel, 9MM, Fits Sig P365XL, Nitride Finish, Black ZP.365XLBTCBN The Zaffiri Precision Threadless Compensator for Sig P365XL is an easy to install aftermarket add-on for flatter shooting. Zaffiri's solid 416R stainless steel match grade barrel and strong 17-4 threadless compensator allows for not only gas redirection but less muzzle climb due to its weight. What does that mean for you?! Faster follow-up shots. Using a Ransom Rest they found a 33-35% decrease in muzzle flip when testing with a wide variety of ammo. Utilizing a Ball-Vise locking system (patent-pending), it takes just one set screw to install. With it's unique design to bypass the need for a threaded barrel, this is one must-have piece for your collection.