A&S Conversions
UZI Talk Life Member

It is my limited understanding that MAC didn’t make semi auto pistols. Open bolt semis were from RBP. The RBP semi auto serial number starts with SA. YMMV.
Scott
Scott
It couldn't have been a semi converted before 1986?
MAC did make a semi auto. It was a carbine and it was closed bolt hammer fired, it was designated the M20 and only a few were sold. This gun is not one of them and it’s irrelevant. This gun is a powder springs SMG that was defacedIt is my limited understanding that MAC didn’t make semi auto pistols. Open bolt semis were from RBP. The RBP semi auto serial number starts with SA. YMMV.
Scott
I would certainly defer to your experience of research. Did PS use the same weld in style frame for the searshaft similar to the RPB weld in frame?MAC did make a semi auto. It was a carbine and it was closed bolt hammer fired, it was designated the M20 and only a few were sold. This gun is not one of them and it’s irrelevant. This gun is a powder springs SMG that was defaced
No, they did not as it was not an open bolt gun and it had totally different fire control parts. It was hammer fired closed bolt and it had a selector switch permanently welded into the frame.I would certainly defer to your experience of research. Did PS use the same weld in style frame for the searshaft similar to the RPB weld in frame?
Scott
On a F4 item you do not engrave the trust or makers info. Only on a F1 do you engrave the makers information. The maker can be a trust.Perhaps they kept their MAC, sold this in its place, and thought they were a genius?
Regardless, I wouldn't want to be in the same room with that lower.
EDIT: Looking more at that photo, it could also be a theft recovery. Forensic detectives often use acid to try to reveal mangled serial numbers/trace guns. In that case, perhaps the gun was returned to the owner by police, and since the owner had not personally obliterated the SN, they were able to keep the gun, and re-stamp.
Furthermore, if it was on a trust, the owner's trust would be engraved somehwere, lending further proof of ownership.
My Gammy could've done a better repair. Hell, a 5th grader with some Bondo and Krylon could do better...
Over on ARFCOM they used to post/give out the WECSOG diploma for such workmanship on firearms. Wiley E. Coyote School Of Gun Smithing.That's some quality work from the Harbor Freight School of Gunsmiting
looks more like a michael j fox and stevie wonder collab projectWiley E. Coyote School Of Gun Smithing.