APA markets one, flush type. Super stealth release. Stronger than it looks and works. I like mine.
The Surgeon version has an ambi that is a little less streamlined. Extended bottom version also.
Take your pick.
Flush is nice along with the smooth release design
I wish AI / AINA, or somebody, made the nice fitting Teflon coated steel mags in 223. Mabie they could make inserts. If I were them, I sure would.