Originally designed to work with PRID Kup in a Soundwave custom, then extended for use with FoC Soundwave, this is a set of both weapons together to save a little money. The Missile Launcher is 56mm long. The Concussion Blaster is also 56mm long when 'in disguise', and 77mm long when deployed. Diameter of both is 15mm. Assembly (including a little brute force and ignorance on the Concussion Blaster) is required. Pics and instructions soon!