Depends on which gun and condition, condition, and condition...
date a gun
What model is it. How old is it, what condition is it in, is it still working?
Gun store.
10-100 usd
You can order parts at www.wisnersinc.com
dude not trying to be mean, but what gun are you talking about dude! if i had a gun i could tell u how much its worth, and also you could do it yourself!
It could be anywhere from 30-100 years old and worth 50-300 USD
Not old enough to be worth much at the gun show but definitely old enough to hang on to. Just my thoughts.
No gun killed Lincoln.
Roughly $25.
alot