In the Line of Duty: The FBI Murders

[MT2008]

Originally Posted by predator20

Here is a close up of the receiver. Maybe it'll help.

Definitely an A2-style receiver. The question is whether it gets fired on auto or not. And even if it fired on auto, that means it's one of the Hollywood "Franken-M16s" (an A2 upper on an A1 lower, or some other full-auto lower).