ID: 28203 (PH-GL-04-03)
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Guarder Modify Bore-Up Polycarbonate Piston Head.
Weight: 20 g
Bore up parts feature larger inner diameters to increase air volume for each shot. Bore up parts must be used with other compatible bore up internal parts.
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"Really strong piston head, same one that is in the guarder full tune up kits. Supported my m150 set up for a year then my m160 set up for the past 6 months giving me 550 fps w/ .20's. Still had to wrap the inside of the o-ring slot with teflon tape to widen the diameter of the o-ring itself to get a tighter fit in the cylinder and therefor a perfect seal. Its still not broken but im about to get a new one because after my SL8 had been sitting around for a couple months, the grease ran dry in the cylinder and the thin part that holds the o-ring in place got a little warped out of shape. Still works but I would rather not take any chances. Recommended for high power set-ups but make sure you perform gearbox maintenance regularly. (i.e. lube cylinder, check seal)
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