hello, i recently just got a nail gun and i was wondering if i could modify it and make it shoot more accurate and more far. i had a quick look on YouTube and couldn't find anything. also could i use the valve out of it to make a semi auto gun?

also it is a Stanley Bostitch if that helps.

thank you very much

well I've started to make my air gun with a qev valve, but i don't know how to join all the materials together. i need to know how to join copper piping onto a brass fitting. do i weld it on or solder it on or something else? also i'm gluing an o ring onto the barrel where the piston pushes against ...