This specific round was developed by Fred Craig and Rock Island Armory (previously called the 22 Micro-Mag). It has been embraced by hunters, self-defense and shooting enthusiasts alike because of its velocity and stopping power.Rock Island: Solid as a... Stone.
The TCM Rock Standard is constructed in 4140 Ordnance steel and refined by Rock Island's carefully managed hand fitting process. Built to drive the original Armscor .22 TCM cartridge over 2, 000 FPS, it features a 5" barrel with penetrating impact and remarkably light recoil. Add a double stack mag well with 17-round capacity, and it earns repect for delivering a big-time payload.