https://sites.google.com/site/hsarmory/ ... d-servicesDon't expect it to be easy. You will need to modify both your hopup chamber (usually) and barrel. This means cutting your barrel hopup window longer and doing some mods to everything plus tuning it to perfection. Plus, the R-hop is suited to heavier bbs (.30) so it might be a little overkill if you are planning on running it in something shooting .20-.25s. Of course, you can always shim your hopup arm with a little tin foil to make fine tuning easier. I would say try shaving your bucking's inner guide line and mound first (flat hop) and then go from there. That or hire somebody with a lot of AEG knowledge to do it for you, as this mod takes a lot of expertise, patience, and tuning to get good results. Unless of course you are confident that you can do it yourself :P