IMPORTANT: The valve is sealed by high pressure, it won't leak when the pressure up to 3~4MPa.
1.We also have Shoulder Stock and barrel band for this kit, you can find it from our store
2.We have tested well the valve before shipping, so you'd better not adjust or disassemble them at will.
3.To install them, you only need to keep the original barrel, grip & trigger set, and Push Pin.
4.We will make high pressure and sealing test before shipping, so there may be some sign of use.
5.In the case of keeping best initial velocity, it can be shot about more than 20~30 times.(Due to spring size and length of cylinder).
6.Please choose the right length for your barrel.