This is a MOLLE II Utility Pouch / 100 Round SAW Gunnar Magazine Pouch. These pouches are genuine US Military Surplus, made in the USA by The Specialty Group, Inc. They are brand new, never issued or worn. Each pouch measures approximately 7" x 5" x 3.5". This pouch is designed to hold 100 rounds of belt ammunition, or can be used as a general utility pouch. It features plastic inserts on the side so that it holds its shape even when empty.
I bought this to replace the ACU pouch from my Individual First Aid Kit, and it's a perfect fit!