check to see that your bolt is in correctly...the regular promaster can be put in upside down sometimes not letting the air through and the bolt just pushes the ball out the end of the barrel
icd lasoya blue/black
cp reg,cp trigger,trinity asa,empire neck
empire voodoo grip,kila board&detents,ebay valve,
,redz pepper stix,prophecy,crossfire lp tank,crammer "yay" and a thousand yard stare.