The Single 556 is designed to hold one 30 round 5.56mm AR magazine. It is specifically sized for thicker magazines, so most polymer mags will fit. It is laser cut from Cordura laminate, making the pouch very abrasion resistant while still being lightweight. The pouch includes a removable Kydex magazine insert. The bottom corners of the pouch are open to allow water and any other particulate to rapidly exit. The back of the pouch has a built in mounting system, compatible with PALS webbing. Weighs only 105g and is 5.75” Tall.