I’ve got a 5 rounder for my Origin .22BR. I like it EXCEPT if something pushes up on the mag, the lug hits the top of the mag and stops.
I’m pretty sure I could cure it pretty quick with a file if I’d just take the time. Feeds fine otherwise.
I also have the MDT BR mag. Good mag, feeds great, but it’s $90, big, long, and heavy.
Honestly, I run the Magpul 90% of the time and just dont push on the bottom of it (it gets single fed most of the time anyway).
Bear in mind, I’m not shooting PRS matches with it either (at least not yet!)