I love the mini action concept. I had an older one with the 1:12 twist. It was the first rifle I owned that would put about any load at or under an inch. I killed a pile of coyotes with it and a few deer, dad has it now. I’m moving toward a Howa Mini in 224 Grendel as a replacement.
Check out their bottom metal. Works perfectly, nicely made. Waiting to see the Mini stock they're working on. If I were building, I'd consider them too.
http://www.oregunsmithingllc.com/