Dyna Piston Head For M&P9/HK45/XDM-40/PX4/FN5-7 Gas BlowBack Pistol Series

Dyna Piston Head For M&P9/HK45/XDM-40/PX4/FN5-7 Gas BlowBack Pistol Series

Product Information -

This is an upgraded Piston Head and O Ring. Which goes inside the Blow Back Unit.  Its got a 6 hole design to expand the o ring as the piston compresses but not cause restriction as it contracts for improved efficiency of cycling, and an increase to the kick of the blowback action. 

This is the 15mm Over-sized version for use with Tokyo Marui models which have moved to the improved larger 15mm piston size.

Because all brands have different dimensions we can only confirm this to be a 100% fit for the Tokyo Marui Guns listed below unless specifically stated otherwise.

Confirmed To Fit -

Tokyo Marui - M&P9 Gas BlowBack Pistol Series

Tokyo Marui - M&P9 V-Custom Gas BlowBack Pistol Series

Tokyo Marui - HK45 Gas BlowBack Pistol Series

Tokyo Marui - HK45 Tactical Gas BlowBack Pistol Series

Tokyo Marui - XDM-40 Gas BlowBack Pistol Series

Tokyo Marui - PX-4 Gas BlowBack Pistol Series

Tokyo Marui - FN-57 Gas BlowBack Pistol Series