
I have a call with the Minnesota ATF Group Supervisor today on the subject. I'm hoping to get better clarity on an early (1972-1973) MAC and how the ATF would agree whether it's truly C&R or not.
I spoke with Rueben and he informed me that just because the gun might be 50 years old, doesn't mean the ATF will agree on it. I guess Minnesota is a difficult state to deal with. One thing he told me I could try is have a gun club purchase it for me, I could use it, and when it does hit C&R, it obviously would be mine to take home. Only thing is, I don't want to purchase a $8k+ piece of equipment and end up having to wait 20 years because the ATF won't consider it C&R. I'll really have to get the serial numbers checked on whatever I do purchase.
I also reached out to another dealer who informed me MACs aren't C&R???? It was one listed in this thread.
If it was mfg/registered more than 50yrs ago and is in original config,
it should be C&R by their rules. I'm intrigued to hear the results of the call
if ATF is not following their own guidance.

Please go to https://www.atf.gov/firearms/curios-relics:
"To be recognized as C&R items, firearms must fall within one of the following categories:
1. Firearms which were manufactured at least 50 years prior to the current date, but not including replicas of such firearms;"
IMHO, most Field Agents have a very limited specific knowledge of firearms law. They have to know a little bit of law pertaining to all aspects of what the BATF&E has oversight of. A supervisor is managing people, not making cases. The odds that the supervisor you spoke with knows the date when MAC started producing M10s is not so likely. The vast majority of M10s were made in the 80s. SWD made Mac style machineguns for the collector market and were very successful. Most of the other manufacturers chased Government contracts and went under doing so. It is my understanding that around 3,000 M11s, 8,000 M10s, and over 17,000 M11/NINEs are in the registry as transferable machineguns made by all of the manufacturers combined. The M11/NINE was invented by SWD. No other manufacturers made M11/NINEs because SWD was the last manufacturer to make MAC style RRs before the registration ban in '86.
Never trust anything an ATF employee tells you. Whether personally or on the phone. Get the response in writing. Even then it is BS. A woman at the NFA Branch told me over the phone in 2005 that I could "make" a machinegun if I submitted a Form 1. With my C&R FFL I purchased a Thompson directly from an out of state dealer. YMMV.
Scott
^~~ Scott is spot on. C&R Mac’s 100% exist currently. That said, only a small percentage, probably less then 10% are currently c&r and they JUST hit mark the within the past 12 months, so the ATF may not have yet even transferred one as a C&R. The only way you’ll know for sure is to buy one that was manufactured over 50 years ago and submit it for transfer. At which point the ATF will pull the original form 2 and if the date on that is more then 50 years old, it’ll go through. I realize how ass backward it seems that a bunch of schmuks on the interwebs are contradicting what the schmucks that are supposed to be in charge are saying, but the50 year rule is literally codified in federal law. There’s 3 ways a gun gets c&r. 1) it’s over 50 years old, 2) it’s declared by the curator of a a museum as C&R,or the ATF makes a determination as such and puts it in the book. That one (possibly last two) are the only ones where ATF judgement comes into play. The first scenario is automatic.
If you manage to find an early 1970's M10 that's arguably a C&R -- do you buy it? It's not on the ATF list. Seems to be some uncertainty whether it is or is not a C&R. Frankly, if it was me I'd get a machine gun on the C&R list to avoid any problems. Suppose you spend $10k on it and ATF decides nope, not C&R -- Minnesota says, sorry you can't own it here. No chance of that drama if its on the ATF list. I really think you ought to consider a Reising. A sten would be better, but a real C&R one -- not some tube gun -- would probably be pretty pricey.
Plus, macs are dangerous to shoot in stock configuration. IMO.
