CowCow Enhanced Piston Head For Marui G19

- Enhanced Piston Head for Air-Tightness.
- Designed to withstand high impact pressure.
- Stabilized Performance.
- Improved durability over TM piston headDrop-in upgrade part

For TM original BBU
For TM G19 Gen3 and Gen4, V10, M&P9, M&P9 V-Custom, TM G17 Gen4