JBaum wrote:Salt6 lives! Welcome home, friend.
Conversely to the above possibility, it could have been a registered machine gun, and the guy made a semi auto kit that works in the MG receiver. It's perfectly legal to do that, just not the other way around.
Yes, and no. Yes, one can use semi parts in a registered auto to make it work like a semi.
In some situations, auto operation using dedicated auto parts may be used in a semi. This is commonly done with HK rifles, where a registered trigger pack is used in a semi gun. It's been done by SOTs that register auto internals and use them in semi Browning 1919/1917. So theoretically one could register MG42 auto parts and use them in a semi gun, though I don't know technically how that would be accomplished, and it's generally considered one of those things not discussed in an open forum. And don't PM me asking me, because I know neither the mechanical nor paperwork solution.