To be fair, he did say semi only...so it would plunk away, it's just that the gunners on the range would want to go over and p*ss on a Reising but they'd all admire a Thompson...
Problems with the semi Thompsons that are already out there is they aren't a real Thompson, Brian will know what I mean. Once you've worked with the real thing enough you can't accept the copy. If I was doing it, and in the US, I'd pay the tax stamp and get a real M1and get to work...