A 5mm blaster accessory designed for the Transformers Combiner Wars Motormaster/Menasor, based off the character's original G1 accessory. The handle is 5mm, however, so any figure that features 5mm peg/ports should be compatible. This model has been tested in Purple Strong & Flexible, so that material is recommended.
This item is now retired, as a better version exists here:
https://www.shapeways.com/product/3B3DJDL2S/king-of-the-road-s-blaster-redux?optionId=63472528