Hey Paul, sounds to me like the valve/body alignment is out of place. You want to minimize any gap between the stainless body and the aluminum valve in the back. There should be two set screws beneath the barrel in front of the foregrip. By loosening them, you should be able to push the body rearward. Tighten them back up (not so much that you can't screw the barrel on) and try again. No need to degas when doing this.
Originally Posted by agentSmith
oldschool play is about sportsmanship and respect, oldschool gear is available on Ebay.