The guy's a bit "purist," despite being a lawyer, but his info does put a caveat on the old view that open-bolts are automatically considered "machine guns" by ATF'nE.
My response after video:
Closed-bolt guns are better, regardless. Given political realities, there is no reason to stretch our luck. And TDF 10 lays out an originalist argument to accept but contain the country's decision in 1934 to restrict full-auto.
Just please consider the political consequences of any action. (That means, don't be a self-indulgent liberatarian.)
