Thanks for any help here.......
I have dozens of Chi-Com mags both Poly and Norinco but this is the first time I have run across one marked like this.
Anyone have any info on it?

Floorplate is marked  "" 30RD MAGAZINE- MADE IN CHINA -CJA SFLD MI ''''

It has 3 witness holes like a POLY TECH.
The small bump inside the mag well to keep the follower away from the feed lips has been removed. Making it a BHO Mag.

Clearly it is Chinese. But strange to see "30RD Magazine" and "CJA SFLD MI"

Maybe they are all over the place but I have never seen one.
Any thoughts?

Local importer marked it himself.


Somebody else ground down the bump to convert it to BHO.


Pretty common, I've done it also to everyone of my chinese mags.



Kinda like you see some of the AR chinese drums with writing on them where the importer put his name on the goods he imported, but most did not do that.

Exactly.  They're pretty common out there - I saw three yesterday in a bin at the show.