i am having a serious problem with my JG thundermaul. when i first got the gun i thought it was pretty cool. then when i started to shoot it (i was aiming at a small target) it wasn't hitting it. i took out the magazine and realized that i was loosing bbs so it was obviously shooting, so i tried a larger target and i realized the bbs were curving up aout 2 inches. i tried ajusting the hop-up. it worked,slightly. now the bbs only curve up about 1 inch. I have no idea how to fix it and i hope i could get some answers.