I think that kit uses half tooth gears. Checked UNcompany and WGC and they list the G3 150 kits with HT pistons. Redwolf doesn't but I think its an error. I also think they used the SP120 kit's picture. If I remember correctly my friend also had them and needed a HT piston. They can also be a pain to shim because you have not only get them perfect to get the benefits of helical gears you also have to match the sector gear with the piston right. Better double check. I like their springs though. If you want to run a 450FPS spring you should use helical gears though. They'll last longer and they will run quieter just double check if you can use FT pistons on them. My Prometheus STT gears I'm selling use FT pistons. I got video of of them if your interested.
mateba
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