Gatling gun building brick

For some reason I had the sudden urge to design a gatling gun that would fit with Lego and hopefully other ranges of building block toys. I've included two versions, one is the precise fitting as measured from a sample building block and the other is optimised for printing on FDM printers. (Mines a FlashForge dual). Print time was under 15 minutes at a layer thickness of 0.15mm. The size compared to a regular Lego brick is 1 x 3 x 5. My test print had a bit of oozing near the end of the print and I'm lazy when it comes to removing support material. Hence the seeming poor quality fit in the photo.