Posted 24 March 2014 - 12:58 PM
When you compress the spring, theoretically it should "shorten" the spring and reduce the FPS. In theory it sounds great. In reality it doesn't work. I've seen some tests done where someone compressed his spring for 6 months and it still shot the same. As for bucking, KWA's stock bucking sucks. There're no two ways around it. G&G green is decent, as is JG blue. I have JG blue on my SR10. However, I was recently introduced to Maple Leaf 70°, which comes with a flat hop. That's what I have on my SR7, and it shoots almost as well, if not just as well as my SR10 despite the shorter barrel on the SR7. I highly recommend it and it's in the same general price range. Mine cost me $15. As BLATELY suggested, I would send it in for warranty before messing with the bucking. Hope this helps and happy airsofting!