We came across these pouches and bought some to go with our Go-Bags but you can use them with any Molle equipped equipment. They will handily hold rounds up to a bit over 5". Our 37mm to 26mm adapters are fine with them.
These ammo pouches can also be used for 9mm double stacked mags.
Check out the Go-Bag in the accessory links below.
Note that this IS made in China. This is one of those cases were the best product is one from off shore.
Color: Black. Clay. Army Green. Other fabric sizes can be customized.
Material: 600D nylon fabric
Uses: You can put two clips, or other accessories.
High-quality nylon material, waterproof and anti-corrosion, strong and durable, at the same time taking into account comfort, softer feel
Molle design can be loaded onto tactical vests, belts, girdles, and other devices
Velcro and mouth closed double to prevent items from falling, inner bag compartments
Light weight, small size, easy to carry, easy to use