I wouldn't count on a GI mag catch fitting a Universal unless its a very early model with one operating spring. Those used a lot of GI parts.
I bought around 1000 rds of the Korean mmo about a year ago..good stuff.The South Korean army used the M1 carbines for years and passed them on to their home reserve in the 1980s. KCI made their mags and they can still be purchased on GunMag Warehouse. They work fine in my Fulton Armory M1. PMC ran their ammo plant on a line designed and built by Winchester. I bought some of their surplus ammo (1983-85 dated) from SGAmmo, 1080 round sealed cans, in stripper clips and bandoliers, about two years ago. Excellent mil spec ammo. Some of it may still be on the market. It was about $0.38 per round at the time. Goes for about $1.00 + now. Hornady makes a 110 gr FTX carbine ammo that feeds well as does the Federal RNSP ammo.
If you recall, South Korea wanted to return thousands of Carbines back to the US about 10 years ago but Obama nixed it. They would have been a nice add to CMP.
Excuse me . . That was a along time ago - and it was $22 dollarsNo such thing in 1962.
DCM - Department (division?) of Civilian Marksmanship.
Lodge brother of my father had six of them sitting in various corners of his house. Said he got them through the NRA back in the early sixties. $25 each.
Same here - you could buy em surplus for 75$ down at the local department store back in the late 70s and early 80s. I already had 30-30s and other deer guns and varmint rifles also so never bought one. If I had only known then what I know now it would be different.I gave a C note for my Inland....35 years ago(?). Bought several extra 15 round GI mags for a song and a dance about the same time. A friend of mine and I split 3000 rounds of Lake City, FMJ for about $150.00 total. I still have most of it.