Mecano Sans should do the trick:
http://www.myfonts.com/fonts/nonpareille/mecano/

Revolution Gothic, if you want a distressed look:
http://www.myfonts.com/fonts/flat-it/revolution-gothic-p/

Shortwave Gothic Medium is nice, if you want a slightly slanted crossbar:
http://www.ascenderfonts.com/font/shortwave-gothic-medium.aspx

Although, all of these appear to have a round-topped M....

Better choice (use the alternate glyph for the U):

http://www.myfonts.com/fonts/primetype/adigo/normal-two/glyphs.html

Some more: Refrigerator Deluxe (playing with alternates to get flat top /A and vertical leg /R), Nicotine, Duke Solid, Union Thug, Face Off

thanks for the suggestions guys!