Paintball gaz passtru by Dead on paintball this is brand new never used. This is made out of metal and it's robust. I initially bought it for my Tippmann A5 but may also fit Tipmann Custom 98 and other markers.
This will also include the Velocity adjustor to dial in your paintball markers FPS. This would be best used for rec ball or woods ball.
These can be used with Co2 or compress air etc and is rated for high pressure.