The M-113 is, today, one of the most successful armored personal carriers in armored vehicles history. Developed and designed in the '50s, it was able to load a fully equipped infantry group and provide close support. On the reliable and flexible M-113 frame many different versions have been created to perform specialized duties on the battlefield. The M-106 mortar carrier is one of the most common variants of the prolific M-113. Directly derived from M-113 frame it was built to transport a 107 or 120 mm heavy mortar. The mortar was mounted in a turntable in the rear troop compartment and it could be fired directly from the vehicle, but could also be fired dismounted. Furthermore, to provide a better on board efficiency, the original M-113 roof has been changed with a three part circular hatch.