Sold my ak body so no use for my ssg gearbox anymore Parts Shs oring air nozzle Shs lightened piston Shs 13.1 gears Metal spring guide w/bearings U-35000 infinity motor Wired to Dean's Aoe corrected, sorbo, shimming, air seal mod etc all done Crisp trigger response and a smooth quiet cycle. Video here for semi + auto test https://youtu.be/ofJ0rPO_61U