The BAIKAL Makarov PMM air pistol, also known as MP-654K (Gen-4) is based on the wider frame of the modern Makarov 9mm PMM pistol (Pistolet Makarova Modernised). It is a semi-automatic double-action .177 (4.5mm) Co2 air pistol designed for close-range target shooting. 90% of Baikal's parts are genuine Makarov's non-viable steel parts and some are slightly modified at the factory. It can accommodate a real Makarov double stack magazine with 10-12 inert rounds, while the upper slide can be pulled back to cock the trigger, just like on its 9mm version. The longer 23mm firing pin is available as a supplement to PMM pistol only. Both PM59 and PMM versions have passed forensic tests conducted by MET Police forensic service and UK Border Force and confirmed as being non-convertible (!)