>>509547594
He didn’t invent ECM rifling
People were rifling barrels in buckets with batteries or by tapping a barrel with a curved rod long before the fgc9
Also redman liner exists which comes pre rifled
https://youtube.com/shorts/cJPA4TnJjFw

They basically killed the guy for assembling a bunch of shit that already existed. You can build a gun with shit from the hardware store in a couple of hours