hi ive got a Dm4 and it seems to use alot of air when playing e.g
i can only get about 2 hoppers full out of my 72cu bottle,is this normal or have i got a problem?
Check that the foremost 020 o-ring on the back cap and the foremost 009 o-ring on the bolt stem are in good condition, if these o-rings are not sealing properly then your efficiency will be poor.