Project Manager Combat Ammunition Systems (PM CAS) procures conventional ammunition for other services as well as the Army. Its new multiple-award, Indefinite Delivery/Indefinite Quantity (IDIQ) contract structure allows PM CAS to compete individual requirements, minimize unit cost through competition, and increase quantity by encouraging vendors to reduce their proposed prices when submitting bids for each individual delivery order that is competitively solicited. Here, Pfc Luis Rivera, a Mortarman with 3rd Battalion, 2nd Marine Regiment, uses an 81 mm mortar during a training exercise aboard Marine Corps Base Camp Lejeune, NC, Aug. 14. (Photo by Cpl Timothy Solano, 2nd Marine Division)