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They found the shooter's Steam profile. And he worked as an intern on Civilization 6.
(www.pcgamer.com)
Tabletop, DnD, board games, and minecraft. Also Animal Crossing.
3rd International Volunteer Brigade (Hexbear gaming discord)
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It was a ghost gun tho, wasn't it? Unless you like-- went to the effort of taking the slide, grips, and trigger well to mirror-fine sanding, I can't see a 3d print being a "favorite gun" of mine. (But I'm also biased, I have little respect for polymer-wrought handguns, and miss the era of polished wood and gunmetal.)