The AM-50 is a bridging system bridging system developed in Czechoslovakia. Up to eight sections can be linked together to cross wide rivers. The bridge is carried on a Tatra 813 cross-country truck that also can deploy the bridge.
The Czech Army has a short article
about the AM-50. And there is a Flickr photostream of the truck in action.
This item consists of a truck deploying a bridge section. A set of two trucks carrying the bridges plus two deployed bridge sections
is also available.
Other Warsaw Pact engineering equipment can be found at Luke Ueda Sarson's shop
. On his blog he has an entry with a picture
of the model being used in a game (close to the end of the article).