Help ID this 9mm [SMG?] Magazine ......

[msmp5]

The one one the left - with the "S" on the rear of the feed lip area - is a Beretta PM12S 9mm SMG mag. The one on the right is ...... I'm not sure! Anyone know? It is very similar to the PM12S mag except the rear of the body does not have the same pattern of holes compared to the PM12S; there's a "32" marking near the bottom of the back of the body of the PM12S mag (no such marking on the other one); and the rear of the feed lip area of the body on the mag on the right has a different cut-out configuration. (Larger cut-out area in the body, to the rear of the feed lip.) Both fit a 9mm round very nicely. I have seen both styes of followers on my other (known) PM12S mags. Any help in ID'ing the mag on the right would be greatly appreciated.

 

[entropy]

Looks like a PM12 mag with a cutout to allow the bolt to stay back when empty? I confess I am not very familiar with the PM-12.
It does say PM-12S on the side in white.

 

[NIGHTLORD40K]

Beretta M38?
https://www.gunsinternational.com/g...r-38-42-sub-machine-gun-.cfm?gun_id=100762733

 

[msmp5]

Yeah, I think you’re right, probably a Beretta M38 mag. Wasn’t the M38 the long-ago predecessor to PM12S? I took it to the range last week, tried it out, and it functioned just fine in my PM12S.

 

[NIGHTLORD40K]

Yup, I actually got to play with a deactivated M38 once. Nice SMG.