The M4/M16 Open Top Mag Pouches With Bungee System Adapts To Any Universal Vest, Belt Or Platform. The Triple M4/M16 Mag Pouch Holds Three 30-Round M4/M16 Magazines, The Double Holds Two 30-Round Magazines And The Single Holds One 30-Round Magazine All Are Secured In Place By Our Elastic Bungee System. We Have Added Front Universal Strapping So You Can Attach Pistol Mag Pouches, Grenade Pouches Etc.