The PMR-30 is a light weight, full size pistol chambered for the flat-shooting .22Magnum cartridge (.22WMR). The PMR-30 operates on a unique hybrid blowback/locked-breech system. This operation system allows for the use of a wide variety of ammunition as it seamlessly adjusts between locked breach and blowback operation, depending on the pressure of the cartridge. It uses a double stack magazine of a new design that holds 30 rounds and fits completely in the grip of the pistol. The trigger is a crisp single action with an over-travel stop. The manual safety is a thumb activated ambidextrous safety lever . The slide locks back after the last shot and a manual slide lock lever is also provided.