You have seen it's bigger brother, now RSOV.com has this Mini for those who prefer a shorter version... "Vanaras full steel Russian PBS1 (MINI) Sound Suppressing Device (silencer for AEG) for -14mm thread muzzle. Each silencer with stamped unique serial number and with realistic appearance and construction like the real steel. A collectible and is a practical item for serious player of Russian combat gears as well as airsoft skirmishers.

The PBS-1 was designed for AK47 / AKM series assault rifles firing 7.62mm ammo (not for AK74 series of 5.45mm ammo) in the real world but it do look geat on a MP5K AEG :-)

The photo showing for comparsion between PBS-1 and PBS-1 Mini.

Last photo showing the PBS 1 Silent Fire Device real steel courtesy of  http://tantal.kalashnikov.guns.ru.