• 800 rounds of 5.56mm cartridges
• 4 magazines for the M249 Squad Automatic Weapon (SAW)
• 12.9 x 7.29 x 8.9”
• about one inch higher, one inch longer and one inch wider than the M2A1
• NSN 8140-01-252-4290
• Drawing number is 9396178

sometimes mistaken for a .50 caliber type

• wide .50 cal
• fat .50