I call shenanigans...
Charged with "convicted felon in possession of a handgun", no mention of NFA or MG. Someone called out WAVE3 on Facebook and they said "The gun is referenced in the article exactly how it was listed in the arrest report. While the M11 does in fact have a semi-automatic version, we trust that the arresting officers know which one this was. Thanks for your feedback."
http://www.wave3.com/story/32479203/convicted-felon-found-with-sub-compact-machine-pistol
The detectives were part of a violent crimes unit and were on patrol in the Chickasaw neighborhood just after midnight July 19. As they turned into the alley behind a liquor store at Cecil and Greenwood Avenues, they saw Brandon Towns, 24, of Louisville, turn away from them when he saw their vehicle.
Detectives said Towns walked down the alley a bit before reaching out and leaning toward a fence. After he was stopped for questioning, detectives found a M-11 sub-compact machine pistol on the ground near the spot where he had been standing. Detectives said Towns pitched the weapon.