Nice work Kevin. The Mossberg mvp, I understand, has some appendage below the bolt to pick up cartridges, as there is some talk about some small part that might break. From what you are saying, you were able to simply have the bolt push feed the cartridges out of the ar mags. Very cool. I doubt I'll take up the torch, but its cool to see what you did. Is the magwell an aluminum alloy? If it was steel, I'd be cutting and welding it into a stock trigger guard.