Check the listing for details. Strike Industries Modular Pistol Compensator for 1/2-28 Barrel (9mm Linear Comp). Color: Black, Condition: New. Listed at 89.95 USD. Product Features: For 9mm threaded barrels (1/2 - 28 TPI)Keeps weapon lights clean Redirects concussive forcePackage Includes:1x FCE CAP BODY1x FCE LARGE BODY3x FCE SMALL BODY1x FCE BASE BODY1x JAM NUT5x O-RINGThis Linear Compensator is a multi-piece system that redirects the concussive force and muzzle flash forward. It also helps keep your weapon light clean and free of any carbon which often cakes onto flashlight lenses - it's even tunable in length! At only 1.87 oz in weight, our comp is not only lightweight it's also the first of its kind to provide a solution within such a compact package. In total there are six parts to this product. A base hub for direct thread, three short body pieces, one long body piece, an end cap, o-rings (to place between each section for anti-rotation), and a locking nut. With its modularity, you decide how long or short you want your blast shield to be. The Strike Pistol Linear Comp does exactly what it's designed to do. However, depending on the pistol platform the recoil guide rod spring may need to be tuned. This is due to the increased weight at the end of the barrel, which may cause a shift in the lock-up timing. Therefore, some trial and error may be needed. WARNING: Due to reduction of slide energy, recoil spring tuning might be required when using this compensatorCOMPATIBILITY: Only 1/2 x 28 TPI 9mm handgun barrels Does not work for any other caliber, DO NOT INSTALL ON RIFLES or CARBINES.