Imagine my surprise when I broke quarantine and found a Robbie The Robot toy for a mere twenty dollars on the shelf! I scooped him up, took him home and whipped up the Disintegrator Pistol for him! Hey, maybe your Transformers want to wield the weapon from Altair 4! I've scaled down my Robbie The Robot Disintegrator and gave it a 5mm grip for all of your favorite Cybertronians to use and abuse. If you have access to a 3d Printer, you can get the files for free here:

blunghole's Thingiverse Profile

Or you can purchase them from Shapeways here:

Dull Surprise Toys by blunghole - Shapeways Shops