Wikipedia The small Stratus Ammunition Carrier (SAC) is perfect for transporting and storing loose ammunition. This small bag comfortably fits 500 rounds of loose 9mm or 250 rounds of 5.56. All of our SAC’s are constructed from 1000 denier cordura nylon, 17337 mil-spec nylon webbing, and YKK #8 zippers unless otherwise specified. Dimensions: L: 7″ W: 5″ H: 2.75″