I just purchased a new (to me) PTAC-10 (AR platform in .308 ) with a free float hand guard.
I noticed a gap between the hand guard and the Barrel Nut/Lower, and wondered if this was normal.
The gap is 37/64".
- Is this normal?
- How can I fix it or close the gap?
(I tried to post pics, but apparently I'm not allowed to do that.)