I dunno, 12, 15, maybe even 20 years ago CMMG had a prototype on their website that would take HK91/G3 mags. I was ready to buy a half dozen, then it never materialized. Did y’all make them & nobody wanted them, was it not possible from an engineering standpoint, or did I just miss out?
I still want them, if you build them them or know where to get them. My original 91 series rifles aren’t getting any younger and like many, I’m well stocked in $0.50 magazines.