CowCow Enhanced Piston Head For Marui TM G17 Gen5 MOS GBB

Description:

- Rubber Constructed Piston Head
- Enhanced Air-Tightness
- Able to Withstand High Pressure 
- Increase Stability & Performance 
- Anti-Oil Rubber Material Used to Increase Durability 
- Compatible With Tokyo Marui TM G17 Gen5 MOS GBBP