i got a bb gun last year for mah b-day and i got bored so i felt like taking it apart. i saw a spring and i figured out that it was the velocity spring so i took it out got a new longer spring and put it in there and i know the velocity is ALOT higher it used to go 300 fps i dont know what it is now. i also took the spring out from the trigger and cut it down so now the trigger pull is really really light it awsome :devil: anyway i lost a spring that was holding my saftey in so now i dont have a safty anymore :devil: it was so hard figuring out how to put it back to gether because all the pieces fell out when i took it apart. and i almost lost the screw to mah trigger so that would have really sucked because you half to have it. anyways i got it backtogether after a few hours but im going to try and do some more mods with it later today o yea if your wondering its made by Daisy and its called the grizzly you can buy it at like miejers and places like that and there pretty cheap. but now i know how bb guns work!!