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Ugh, ok so my rifle is now firing 250-280ish according to my soda can crono, regardless of me using the stock or upgraded m120 spring. It fires at the same FPS it seems, and yes the 2 springs are obviously different in stiffness. ive taken the mechbox apart 6 times now looking for faults....nothing. Im getting good compression between the Piston head and cylinder head, not including the plastic nozzle. It fires straight at 20 ft ( its all the space I have for testing). Problem with all of this is I have no other mechbox to compare this all to. This point im almost ready to replace Piston and head, Cylinder head, nozzle, hopup rubber. Even though I dont see anything wrong with these parts, I dont know what else to do here, and Id hate to install it all to find out its not the issue. Far as I know this 120 spring should be shredding cans at 25-30ft, and well.....its not even close. Thanks for all the help so far, ive looked into every suggestion, but so far nothing. Im sure someone who has done this alot would take a 1/2 hour and go......"oh here, this is the problem", but I dont have the luxury of knowing anyone locally here who knows this stuff. Thanks again, and ill still take suggestions.
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