Airsoft pro Washer, Screw and Thrust Bearing for AEG Piston Heads

Axial bearing is located at the bottom of the piston, where the main spring seats on it. Spring has tendency of axial rotate during fire/compresion and this is the main purpose of the offered bearing - smoother compression. Spring makes lower resistance. Package includes screw,bearing and washer.

 

This is standard dimension of the bearing used by all other producers.