This is a Cannon for vehicle mode of Transformers Combiner Wars Protectobot Streetwise. This is inspired by the G1 accessories for Streetwise. The print has multiple 5mm ports for multiple combination and play options. It also has built in foot pegs for Titan Master and Prime Master figures to satnd on.
To use this with Streetwise, you will need the Streetwise Car cannon Adapter for it. The adapter can be found here: https://www.shapeways.com/product/2Q68WF956/streetwise-car-cannon-adapter-for-cw-transformers?key=3f2bd74a78b5aa6f128db8a01cc78eed
This will plug directly onto the 5mm peg on top of Rook's vehicle mode.
This is intended for adult figure collectors. This is not designed for rough play by children.
This was tested with White Natural Versatile Plastic and fit with no problems. Depending on the plastic you choose, sanding or polish may be needed to fine tune the fit.