The launcher's 12 tubes are arranged in three removable rows of four, mounted on a single-axle carriage with rubber tires. The Type 63 originally fired an 18.8 kilogram rocket (Type 63-2) with a 1.3 kilogram warhead. Ammunition for the Type 63 was later improved (Type 75 and Type 81 series), although the overall weight of the rocket remained the same. A fixed amount of propellant is contained in the rocket motor. The steel-cased rocket is stabilized with spin imparted by six angled nozzles in its base. The Type 63 was distributed on the basis of six per infantry regiment, or 18 per infantry division. For airborne and mountain units the lighter Type 63-I was developed.
The Type 63 and its copies can be mounted on different kinds of armoured and unarmoured vehicles, for example the MT-LB, the Safir, the Mamba, the RG-32 Scout, the GAZ-66 and the M113.
It appears the systems designated BM-12 (for example in Afghanistan and Libya) were or are all of Chinese origin, being merely used or cross-traded by Soviet interests.
A number of countries have developed single-tube, man-portable rocket launchers that fire the same type of rockets:
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