Weird. Try downloading again from the Overview tab of this mod...the file name should be "Miniguns_1.3.zip"; I just downloaded and got version 1.3.
if you downloaded it twice the file name looks like "MiniGuns_1-2.3" which maybe you got 1.3 i put the folder MiniGuns_1.3 in the mods folder and the main menu shows some red text but i don't see the guns to craft on the crafting tables
The base minigun is crafted on the metalwork station, where you make Tier 2 things from steel. The next tier of miniguns are built on the robotic crafting table. The other tiers require the accelerator's table. Here's the thing: the recipes will not be visible until you have the right crafting table. This true even if you are in cheat mode. If you want to cheat to get the guns, the item codes are the same as each minigun name (including capitalization if that matters) but without spaces.