The Zaffiri Precision Threadless Compensator is an easy to install aftermarket add-on for flatter shooting. Our solid 17-4 stainless steel match grade barrel and 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. Utilizing our Ball-Socket locking system, it takes just one set screw to install. With its unique design to bypass the need for a threaded barrel, this is one must-have piece for your collection. Designed to be compatible with Sig Sauer P365. Fits flush with Mischief Machine Commander XXL and Macro grip modules. Compensators may require a different Recoil Spring Assembly (Guide Rod) weight depending on what ammunition you are using. Warning - This product is to be installed by a competent gunsmith. No liability is expressed or implied for damage or injury which may result from installation or use of this product. Specifications for Zaffiri Precision Sig Sauer P365 Threadless Comp Pistol Barrel: Manufacturer: Zaffiri Precision Fabric/Material: 17-4 Stainless Steel Cartridge: 9mm Luger Gun Make: SIG Sauer Gun Model: SIG Sauer P365 Barrel Twist Rate: 1-10 Features of Zaffiri Precision Sig Sauer P365 Threadless Comp Pistol Barrel Compatible only with the provided ZP Threadless Comp Barrel Ball and Socket Retention Design. Line up the comp on the provided barrel, tighten down, and start shooting 120 port opening to concentrate downward forces while minimizing horizontal losses Measurements - .55 in x .85 in x 1.27 in. Adds .6 in length to slide Barrel - Threadless, Not Flush with slide (see photos) SAAMI Spec Chamber Rifling - Broach Cut 6 Groove Stress relieved and heat treated to RC 40-42 Package Contents: Zaffiri Precision Sig Sauer P365 Threadless Comp Pistol Barrel Threadless Compensator. Threadless Comp Barrel. Set Screw. Tool.