Original Viet Nam Era U.S. Magazine Case for small arms ammunition Eastern Canvas Products. Vietnam Era US Army M-56 Universal Ammo Pouch.  US Army M-56 Universal Small Ammunition Pouch was used by US troops during the Vietnam war.  These pouches were originally designed for use with three M14 rifle magazines but would continue to be issued for use with the 20-round 5.56mm M16A1 magazines throughout the conflicts in Southeast Asia. This Antique Original U.S. Army case is a must-have for collectors of militaria. Roughly 7 x 6 x 2" . Perfect for those interested in the conflict and history of that era. The item is in great shape and ready for display or use. Don't miss out on adding this rare piece to your collection. BH 008 061925 L176