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  1. Others
    Hi all, I recently had my SPR chrono'd at my local site and it shot 523fps using a 0.2 (site limit is 500fps). The mods are as follows: AA teflon cylinder AA 45deg piston AA M150 AA steel sears/spring guide stopper PPS ball bearing spring guide Prommy 6.03, 433mm ML delta bucking, 80deg...