The United States Army (USA) the main branch of the United States Armed Forces responsible for land-based military operations is now developing a massive 500 round Ammunition backpack for machine gunners. The design is to increase Lethality and effectiveness of its machine gunners in the filed.
The Rapid Equipping Force (REF) on Bagram Airfield, harnesses current and emerging technologies to provide immediate solutions to the urgent challenges of US Army forces deployed in Afghanistan. The REF designed the prototype for the 500 Round Ammunition Pack System or “IRONMAN”, which took a soldier’s concept for an ammunition backpack!
See article: http://www.army.mil/article/96258/Rapid_Equipping_Force_bringing__solutions_to_battlefield_/
The new backpacks are being issued as we speak to some special units in the field.
See video clip http://www.military.com/video/guns/machine-guns/the-ironman-500-round-ammo-backpack/3702830340001/