I'm gaving problems with my cylinder. When I shoot with a m170 spring, almost no air shoots out of the cylinder head. There are no leaks because i checked every place where therr ecould be one and no air came out when I shot. I recently lubed the piston o ring and basically the whole cylinder with white lithium grease, but that didn't really do anything. I checked the spring and it works perfectly on another sniper. I am running an action army zero trigger with its piston, the stock cylinder and spring guide and m170 spring. Do u have any idea on how i could fix this fps issue?