The TCM Rock Ultra FS is built to drive the factory original Rock Island 22 TCM cartridge at over 2000fps. It features a 5" barrel with penetrating impact and unprecedented light recoil. Includes skeletonized hammer and trigger with adjustable over travel stop, low-profile adjustable 2-dot LPA rear sight and high visibility fiber optic front sight. This pistol is fitted with battle ready G10 tactical grips, a durable parkerized coating, and a drop-in 9mm accessory barrel. Action : Semi-Automatic Caliber : 22 TCM/9mm Luger Capacity : 10+1 Barrel Lengths : 5" OAL : 8" Weight : 2.5 lbs Metal Finish : Black Parkerized Read less