StrangeRanger

That rounded edge is indicative of an AOC manufactured receiver Do you have a picture of the left side of the trigger frame? If "FULL AUTO" is on one line then it is also an AOC; if it's on two lines it's a Savage. From what I can see of the trigger frame in the last image you posted I would guess that it's a Savage. Not a big deal if they don't match. A lot of Thompsons have mixed parts as a result of a visit to the armory. My M1 is a Savage upper with an AOC lower

The construction of the Beretta 38/42 through 38/49 is very similar to the K i.e. a piece of heavy-gauge sheet metal formed to make the receiver body and welded to the trunnion and tail cap mounting ring. Berettas do not appear to have been rolled; they're very precise. I have always assumed that the bodies were drawn in a long piece which was then cut to length to produce multiple receivers from a single strip of steel.

IT WORKS!!!!! We did a trial run today with dummy rounds and an unmodified mag. We shoved the mag in place and hit the slide release. It fed. Repeated 3x. Fed each time. No surgery on the feed lips was needed. You've shown us the required mods and they are forthcoming on our mags. I cannot thank you enough

They go into post-samples, display guns and parts stashes

Wasn't someone (Ben Edwards??) planning on making a '21 actuator clone with strengthened ears?

Gunmachines attempted to dramatically increase the rate of fire of the Thompson with a variety of mods. They were somewhat successful in doing so but at the cost of decreased reliability and broken parts.

If anyone coming to the TCA Show has an MP28,II an ERMA or an MP38 that you would be willing to make part of our Axis SMG display please contact Got UZI

Snooze = lose

Four guns I was watching out of curiosity, price checking/possible acquisition Lot 406 Beretta 38A: $44,063 A very nice example but by far the highest price I have seen for one of these Lot 408 MP28,II (Erb tube gun): $26,438 Seems high for a tube gun. Last year an EL Gold MP28,II went for a bargain $14,100 realized. Lot 3435 MAS1938: $19,975. Not enough of these to say but it seems a skosh high; I've seen a couple go in IIRC the $16K range. Lot 3445 Steyr MP34 (Luftwaffe contract) $21,150 From the same lot as mine. This one is a bit rough IDK about the price, again not enough data points

Pretty sure our mags are all Pro-mags. Just like you we'll probably butcher one to see if we can make it work before we go after a "real" one

Northridge has M6 mags in stock https://www.northridgeinc.com/product-p/ingram-1.htm

Grazie! This will give my guy more than enough to get started. I'm still concerned about the presentation angle being too steep but like I said above you're 90% of the way there As to pricing. I've had only one seller respond to my WTB ads. He wanted $850 for a 25 round mag and $1000 for a 12 round. I passed.

Well I have 1 factory 25 round mag so I can shoot mine but there are quite a few guns out there with no mags and the few mags that are available are very expensive. An alternative mag is an interesting project for me but a necessity for those owners

Skoda, Many thanks for the tip. As it happens my favorite gunsmith is a good fabricator and a SIG-certified armorer. He's checking his parts stash for a mag we can test. If we can get it to seat fully and latch up we'll be 90+% of the way there. Given the presentation angle of the SIG vs.that of the Beretta I suspect a little lip surgery will be required but that's a loooong way from a deal breaker. I will post results

When the receiver is a heat and beat piece of heavy gauge sheet metal vs. a machined part or a nice clean tube you're inevitably going to have undesired tolerance stackups When that piece of heavy gauge sheet metal is being manufactured in a factory which has a set production quota and when failure to meet that quota can earn management an all-expense paid vacation to Novosibersk, the stackups will increase astronomically