I definitely have to agree with these ^ 2. More machine guns would make them more affordable to the average Joe, and if we could get some in .22 they would be both more affordable to shoot and less "evil" in the minds of anyone who knows what they're talking about. I'm not implying that .22 is "less-lethal" than other calibers, simply more controllable and (relatively) less accident prone because of that.
To be fair, during a camping trip earlier this month, we had a S&W M&P15-22 start going burst fire due to a dirty trigger group (I honestly don't think the owner ever cleaned it). Unfortunately some of the more safety-conscious adults didn't like the idea of us letting little kids shooting something that had the potential to go SF, so we had to clean it up which put an end to our fun. But gd, after shooting that, I would love to be able to own an FA .22, that was some of the most fun range time I've ever had.