UPDATE: Just to be clear, this is NOT entirely 3d printed! Only the lower receiver and the stock are plastic. The rest of it is REAL METAL. The barrel is cerakoted red which is probably why people are assuming it's plastic.
I finally take the Vanguard JT and Bolt 3d printed ar15 lower receivers out for some testing, along with the "disruptive solutions" bumpfire stock. This is my first time firing any 3d printed guns..
If you want to make one yourself search for the fosscad mega pack in your favorite search engine. Make sure to follow all local laws wherever you are.