Developed primarily for use as a Topol ICBM mobile launcher, the 7912 model is similar in design to the MAZ-547A but has seven axles instead of six, including one dead axle. In the mid-1980s, the MAZ-7917 variant was introduced, with an additional length of and crew cabins similar to the MAZ-7916. At present, the 8-axle MZKT-79921 variant is used to carry the Topol M, Topol's replacement.