FPS ERGAL ventilated piston head w/ ball bearing support

New quality made of POM fabric
special shape to reduce friction and optimize the air floss
the special holes design eliminate the air floss turbolences and improve the air load and eject!
Besides the external ring, has been extended to reduce the impact surface, to save shock noise and prevent energy loss
this will makes the piston head to eject the same air quantity on each bb making the gun more accurate
double rubber super seal oring and spring ball bearing support pad included.
For Marui/G&p/Ka aeg and compatibles electric gun rifles!
Weight: 9.8g only.