The troop-carrier M-1 13, developed for the U.S. Army towards the later fifties, is the world's most widely used vehicle of its category. Besides that, it is the armoured vehicle with the largest production ever made in the United States. More than 75.000 units have so far been produced. It is a low cost vehicle with excelleri" characteristics. The small amphibious vehicle is able to carry a platoon of infantry soldiers. To-day it is still used by at least 40 armies. Over the years M-1 13 have been converted into various weapons systems carriers: mortarcarrier, anti-tank and anti-aircraft vehicles (No. 264 and 269) as well as recovery 'and bridge layer vehicles.