JBU aluminium piston (half teeth)

JBU aluminium piston with metal half teeth designed as an upgrade part for springs M140 - M170. Second tooth in the jaw was removed on purpose to prevent damage in case of a malfunction.

This piston allows you to switch the teeth frame: JB-JA-35, JB-JA-34.

This piston is suitable for a majority of AEG airsoft guns except SR25, PSG1 and other with atypical gearboxes. Compatible with gears designed for use with half teeth pistons.

Material of the body: Aluminium
Material of teeth: Steel