How about the Lee-enfields?
Now you’re just being silly. Name a semi that uses Lee Enfield magazines.
Apologies to geologist for disrupting his thread.
There have been a few semi autos that take Enfield mags although they are kind of weird conversion contraptions and not common. But they do exist.
There's even at least one full auto as well.
Under today’s present laws if its marked for use in the 7600 and doesn’t say 7400 anywhere on it, sorta like using a 10 rd pistol mag in a carbine.
The same identical mag marked 7400 with or without the bolt stop would be trouble.