Mil-Tec open top magazine pouch, single

A simple open-top style mag pouch with a flexible fit, meaning this can take just about any common assault rifle magazine. Cheap and works well enough.

Open top pouches are great for fast magazine changes. The tradeoff is the lack of protection for the mag. If you don't need to crawl much, these are good. Although meant for M16 style mags, most common assault rifle mags fit pretty well. For SMG and pistol magazines there are other pouches.

Dimensions 8.5 x 3 x 12.5 cm / (3.5" x 1.2" x 5").

Made by Mil-Tec, and these are sort of meant for airsoft use. For situations where someone's life is at stake, get something else, but for recreational sports, these are all good. Made likely in China.