Metal piston head with the bearing - M150 spring and up
Back-pressure piston head made on CNC machines from aluminum. As a result, it provides high performance and durability. Recommended for springs M150 and more. Screw and washer included.
SLONG Airsoft
is an airsoft manufacturer in Taiwan producing spare, upgrade parts and accessories such as hop-up chambers, inner barrels, motors, connectors, wiring, parts for gearbox and even outer parts such as handguards and stocks, so you can make a complete AEG just using parts from them. In 2020 SLONG Airsoft released its own M4 AEG rifle.