3.8 Threaded Barrel w/ Self-Indexing Compensator kit. This drop-in system is designed to work with any standard configuration Hellcat 9mm pistol and features a black Melonite finish for rust-resistance and lubricity as well as 1/2x28 threading. The compensator, included with the threaded barrel, helps reduce muzzle rise and perceived recoil. For use in any 3" Hellcat pistol configuration. WILL NOT FIT THE HELLCAT PRO! FOR USE WITH STANDARD HELLCAT CONFIGURATIONS ONLY!