Canadian 1951 Pattern Ammuition Pouch (left). The Ammunition or Basic Pouch was slightly larger than the 1937 Pattern and was designed to hold Rifle, Bren or Sten magazines, grenades or 2 inch mortar bombs. Rear view of the Ammunition Pouch. The belt was run through either of the pairs of loops, allowing the pouch to be worn high or low on the belt. The Ammunition Pouch in place on the waistbelt, with the brace attached.