Owen Richards Posted September 29, 2017 Share Posted September 29, 2017 Hi all, I have a G&G CM16 sr-l and would like to upgrade the spring to achieve a more consistent 340 - 350 FPS rather than the 290 - 300 FPS that I'm currently getting. I would really appreciate any guidance in which spring I should be buying to achieve the objective? Many thanks :-) Link to comment Share on other sites More sharing options...
Supporters Sitting Duck Posted September 29, 2017 Supporters Share Posted September 29, 2017 Element M105 maybe a SHS M100 but might be a smidge low SHS M110 will be too high Reckon you need a new piston o-ring - that might be where you could losing some fps could pfte the cylinder head, SHS M4 nozzle perhaps but reckon the piston head o-ring isn't great - that is usual big culprit of fps loss Element M105 & better seals should get you at 348fps on 0.20's (or 310/315 on 0.25's roughly speaking) Link to comment Share on other sites More sharing options...
Bunny87 Posted May 13, 2021 Share Posted May 13, 2021 Did you achieve the 350 fps Owen? Link to comment Share on other sites More sharing options...
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