This is a percussion gun, my brother bought the kit for my dad over 30 years ago, he never put it together. The kit has been in dad's basement for years untouched, he is 98 and on a walker so he would have never finished it. My brother found it on a closet clean up and asked me if I wanted it, me being a gun builder and all. Rather than take it for free I sent what I thought it was worth ($300) to my brother to put in dad's always meager bank account. I felt I needed to pay for it, that way if I keep it or sell it no feelings will be hurt.