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Old January 18th, 2015, 23:06   #7
USP_45
 
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Join Date: Jul 2011
Location: Edmonton
Mine had this same problem, what I did was replace the piston head with a Nineball Dyna Piston Head, as well as fill up the mags for a bit longer. If I'm plinking at home and shooting rapidly, I would get 10-15 shots per mag. If I am in a game scenario where I'm only shooting it periodically, I could get the entire mag to fire.
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