My L96 shoots 460 FPS with .25 bbs, it has full action army upgrades, has a very smooth pull and return, it is also very quiet as I cut the outer barrel down by 150mm, rethreaded it and added a foam filled suppressor onto it, the inner barrel is about 400mm as I had one lying around. Not sure if the cylinder barrel ratio is correct but it has a accurate range of 270ft, measured with a tape, using 46 bbs. Doing the rethreading was a struggle as I has the tap but had to do it by hand as I had no lathe and the drill I had was to powerful to control easily