@Empty_Shell_LLC and @Aeroknox have been posting progress pics of their 5.56 minigun project and their D12 bullpup shotgun project.

Here is a video of a successful test fire. It is a burst of 5.56. Looks like 10-15 rounds. The first clip of the video is real time. It looks like one bang. Then they show slow motion.

According to Aeroknox, these will be available at the end of the year. No mention of price. Obviously we cannot own the microgun, but I would love to try shooting one.