The open top design is for instant access to your mag for a faster reload. The mag is retained by bungees with a strong pull tab and are pushed aside for quick reloads. With the bungee top design, Magpuls can be used and still fit the pouch. At the rear of the pouch are two stud fastening straps which feed through the molle
loops on any carrier being used. There is also a lower drain hole so rainwater can escape.