I know about airsoftparts.ca. I was going to order a ball bearing piston head from them (probably MASK), but I came across this tune up kit and was hoping to upgrade quite a few things while I had the gearbox open. Also the kit comes with an M100 spring, and right now I need to downgrade the spring in my gun, currently 400 fps with .2s. So basically that kit hits everything that I need. This kit is so convenient that I was hoping the parts were of halfway decent quality.
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