I just thought it was abbreviating "model," as they do reference "Model 2200" repeatedly in the blurb on their site: I count 9 times in the window itself, 7 time on their site, and 5 times in the one paragraph of copy they wrote.
That said, It was probably the "outlaw" that did the web content who started this horrific offense.
Now that you say it though, and I look back, I wonder where I picked it up?