idk its very snappy and abbey ultra is supposed to be weaker than gg and propane 
 
	 
 
	ive done a complete strip down and nothings off, barrels been cleaned ive also replaced all the springs in the nozzle with a dytac set and its about the same maybe 3fps higher 
 
	could be the bbs ive got im going to order up some bls bbs as ive run out of those atm and currently using valkens because thats all i can get atm