can a juvenile adjudication for a weapons charge (I think it was unlawfully carrying in a school zone) be used to enhance an adult charge involving a gun (terroristic threat)?

Depends. Enhance how ?

12.42 (f) will give you most of the good stuff.
Can't be used to take away probation or to enhance to 25-Life range or Life only range.
And can only be used if post '96 and TYC commitment.

[This message was edited by Stacey L. Brownlee on 12-15-05 at .]