These really impressed us when they came in. We like them because they are slightly smaller than the usual 'tactical manbags' and because of the MOLLE loops on the back, it can be attached to a vest, belt or rucksack instead of using the shoulder strap. VERY versatile and most definitely a multi purpose product!
The two side pouches are big enough to hold plenty of pistol mags (tested with 1911 sizes mags) and both contain inner mesh pockets for car keys, multi tools etc.
Whilst not specifically a mag pouch, the main compartment holds up to five M4 mags side by side, or any other smaller items (grenades, BB's, speed speedloaders, Twix's etc). There is also a smaller mesh pocket and a larger 'slim' pocket within this main pouch.
If your a photographer (airsoft or otherwise) this bag will comfortably hold a camera and a couple of lenses, and is a bit more tactical than a standard camera bag!!
All in all, a great piece of kit at a wallet friendly price.