It remained amphibious, but now weighed around 7,000lbs. Between 1968 and 1972 15,274 Gama Goats, officially the M561 6 x 6 11/4 -Ton Truck, were built by CONDEC. The ‘Goat replaced the M37 3 /4-ton trucks and the unhappy Jeep M715 series 11/4 -tons trucks in many units, especially airborne, airmobile and ‘leg’ infantry ones.