These are the specific Saiga 12 pouches with a sgm 12 and 10 rounder loaded in, initial feelings are this was a good choice. Very secure after a quick adjustment and I couldn't shake the mag out of it but could easily pull it out.
The standard AR/AK pouches do fit a Saiga mag as well but the purchase it has on a larger one isn't something I'd trust. Maybe with a 8 rounder or the 5 rounder I have pictured. I tried putting 2 mags Saiga mags into the double pouch and it worked but I think the pouch would be awkward with anything bigger then a oem 8 rounder.
5 round oem mag in the 2+1