Yes- plan to use SA 7.62 x 51 barrel and extractor swap. Semi auto. I read that the ZB 26/30 mags would work, but somehow missed that metal removal in receiver was necessary. When I insert mag it looks like more than a little needs to be removed, so have reservations. My mag well length is factory spec. Anyone have pics showing post metal removal? Side note. I have used the ZB 39 mag with small tab added to front of mag for secure fit and it functioned well.