Took my Thompsons out to clean.
(The bottom is a movie-prop and was nearby so threw it in to photograph for fun.)
On top is Auto ordnance 1927a1 .45 acp semi-automatic.
Center is Auto Ordnance 1927a3 .22 lr semi-automatic.
On bottom and not in the safe is an MGC Replica.
The top two have 16" barrels to comply with civilian ownership laws -

Sorry about the poor lighting - my phone cam used to take good pictures, it is clearly dying a slow death.

Note the reduced size Thompson .22 drum, and curved mag - the loading device allows the curved section to move up and down to lock into battery - fascinating but awkward.

*You can see the "bullet button" device for CA compliancy inside the mag release.