Available at RSOV.com for US$46.99 and can work not only on airsoft kalashnikovs with negative 14mm muzzles... "Vanaras full steel Russian PBS-1 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 practical item for serious player of Russian combat gears as well as airsoft skirmishers."