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, if you need it, please contact us.
2: We have set the best constant valve before shipping, so you'd better not adjust or disassemble them at will.
3: You will get 2 types of spring, 0.7*7*50 and 0.8*7*50(mm).
4: To install them, you only need to keep the original barrel, grip & trigger set, and Push Pin.
5: In the case of keeping best initial velocity, it can be shot about more than 40 times.(Testing Environment: constant pressure is 5.5mpa, Titanium-alloy cylinder is 20mpa, spring is 0.7*7*50mm). The Ti-alloy cylinder can be up to 25mpa, so you can shoot it more than 40 times.
6: Please choose the right length for your barrel.