I ended up putting in it on my 10 gauge frame but the fit was a little sloppy, so I found out my youngest brother had a Topper that is about 20 years old. We put the barrel on it and it fit very nice. Shot it in and it is going to the woods Saturday. Funny thing, my dad has been watching me try and cobble a gun together and he said I look like "Tuco" from The Good, The Bad, and The Ugly. When he was putting him a six shooter together.