OG Magazine Pouches are designed as a premium offering to the universal placard system that exists within the nylon world. With velcro on both sides, these elastic magazine holders will function with the most popular brands of placards. Instead of pull tabs, velcro/snap flaps, or hard Kydex inserts, their velcro magazine pouches present a simple, dependable, and cost-effective solution. They deliberately leave the bottom ends open to account for your varying placard depths and magazine lengths. Their Triple 556 Rifle Pouch is their most popular option because it accepts three AR-style magazines to keep your fighting rifle topped off. Don't let the name fool you... 300BLK and 458 SOCOM mags will also work just as well in these!Overall Dimensions: 4" x 9.75"