Originally Posted by
Scat Man
no unsupported barrel is just that, the barrel isnt supported in the slide (if im not mistaken) glocks are unsupported also.
someone correct me if im wrong

You're close. Unsupported, meaning the barrel is separate from the frame and "floats" freely in the slide. Most guns are like this, (even 1911s) but the most accurate of handguns are a one piece set-up.