IMFDB Gun identification thread

[Callaway829]

Need help with identification again.



Another view, more of the rifle stock:



And anything in this picture other than the guy second from the right, I've already recognized the Trench Gun he's holding:



Anther angle to possibly help (again, I have the guy in the foreground and also the plaid shirt next to him with the Ithaca 37 Stakeout:




Thanks for the assistance!!

(And I had been doing so well, too...)