WAS Pouches received this morning and tested - off the belt so far...
Well, they can definitely hold all 3 types of my mags. And AK mags too I should imagine.
They can grip very well, even with just one STANAG mag in there, but that's dependent on the bungee tightness, naturally. Now I've slackened it off to let the M14 mags get in a little easier, it could definitely lose a single STANAG, so I'll install the retention loops too.
The M14 mags will be a bit of a 'mare to re-insert once this is on my belt and on me, but it's do-able, and better than not having anything... but it's not a perfect set up. Maybe I should try to find full polymer pouches, if there is such a thing that will stretch to the full M14 size.
I'll have to do a full install and trial before I decide whether to keep them.
The double pistol pouch is a very snug fit with my hi-capa mags. I don't think I need the retention loops for those, which is good because they're really hard work to get over the base of the mags.