The model kit series is called . The "BB" in the title comes from the fact that, initially, BB Senshi models came with airguns that shot BB gun pellets. Due to product liability and safety regulations, the feature was soon removed. 2007 saw the release of the 300th kit in the series. Forming the bulk of the series are Musha Gundam kits; the Musha kits have standard gimmicks like detachable armour and others, such as combination and compatibility of parts between kits. In recent years the G Generation kits have introduced a new proportion and enhanced poseability.