These are replacement tank barrel cannons for Classic Onslaught. Modeled aftered the G1 Onslaught toy's cannon barrels.
Due to the clip system on these barrels I suggest purchasing in any "Strong & Flexible" type materials.
Inspired by G1 Onslaught this figure helps upgrade Classics Onslaught or any other figure that has a 5mm hand hole. This version does not have the mounting hole in the handle for those who want to print this in White Strong & Flexible Polished.