Have a couple of metric odd ball lowers. Marked S and R only no full auto position.

The tang is a little longer than normal (about 1/4" or  more) and the angle is straighter. STG58 and unknown wood stock will not fit.

Unfortunately the grip stud bushing is missing so the would fit a century thumb hole stock.(anyone know where to get the repair for this or will a screw work ?)

Maybe century straightened the tang a little but I dont see any marks and they are still to long.

What looks like a serial number runs vertical where the stock butts up.

Who the heck made these ?

Do Indian have the tang extension like a commonwealth inch ? Heard Indian was a mix of both.

I think Argentina made Semi Only lowers.  I have an Argy in the safe, it's lower is Semi Only.  I'd have to get it out to see the selector markings though.

Thanks. I believe you are correct. Found a picture of a complete lower on the fal files and it looks and marked the same.

FN also made some semi auto marked lowers

Probably Indian.

My Belgian 50.00 has the markings you describe.

Why do you want a semi only lower?

The lower is not the controlled item.

If you really want DSA sell a semi only selector

this probably is the best guess

Did you read the question?