I have an Ares AM013 (Honey badger) which is shooting around 215-220 fps with .25s. The range is fine but the bbs go very slow to there target. I know my honey badger is one of the older models and is completely stock. I am looking at just replacing the spring with an M90 to get the fps up to just over 300 (350fps limit) but i have no idea what this could do to the gun and if anything else will also need replacing. Any help is appreciated.