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| To achieve legal velocity if your gun is shooting low. Field strip your gun. While you have the bolt (part # 12) out , drop it by itself into the gun. It should fall all the way to the bottom without you having to push it. If it does not fall all the way in the o-rings are swollen up and need to be replaced. How fast the bolt and hammer go forward determine how hard they hit the valve. The harder they hit the valve the more gas that comes out. If your bolt o-rings are causing a lot of drag the bolt slows the hammer down and you get low velocity. If you find that the bolt o-rings are not swollen write me back. Doug Brown has some new valve stems (part #18) . They have a little more efficient design and will solve you problem. E-mail him at [email protected] for questions -Damien Barrameda | ||||
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