bigcountry

I am not sure. There is a disclaimer, that claims you might have to modify some older ones. I usually stick with the browning brands for older guns like this. Definatly be best to call hastings or browning. You can do a search for there websight and both have numbers you can call. My auto-5 is around a 1969 model. And the way those things are designed to operate, I want nice tight tolerances where it meets the reciver. Getting ready to retire my old Auto-5 to the safe for the new gold I just picked up. Since my gramps gave it to me These auto-5's just keep going up and up in value. Keep it around for clays.