Inspired by the U-shaped tortilla, the term "taco" has really been copied from the mexican dish.
The various High Speed Gear belt bags, which are designed according to the company's own taco design, consist of a U-shaped side part and U-shaped front and back.
Explained here using the example of the Pistol Taco magazine pouch:
Tacos are available as a polymer (side part) / Cordura (front & back) combination, or as a pure polymer version. The two U-shaped parts are reliably held together by a hard-wearing bungee cord and the pulling resistance of magazines or other tools can be perfectly adjusted using a cord stopper.
This huge assortment of different sizes for magazines of this system allows even other tools such as leathermen, flashlights or radios to find a safe place during every outdoor activity.
As they are very low weight, these bags are the first choice for any tactical equipment expansion.
Also well solved: All taco bags can be attached to any tactical belt (1.5'' or or 1.75'') in a non-slip manner using the molle clip. Besides, the taco pouch integrates perfectly into every other molle system such as backpacks and chest rigs when the intentional use is no longer required.