Originally Posted by hau79
Smokehouse, I have the same one and it was a pain to get on and especially off. I just got an email from Troy at MI and he suggest that the cap might be too far forward. Any ideas on how to flex it back? Do I just start tugging on it real hard?
You may have a few issues...(and I'm not expert so take this for what its worth):
A- Your delta ring may be lose, the weld spring that keeps tension on it may be worn out.
B- Your handguard cap may be lose (the cap that sits against your front sight post/gas block)
C- You handguard may be out of spec...aka a bad unit.
After looking at a gen 1 handguard from MI it seems there are 4 indexing screws on each end (they removed this from a gen 2)...possibly they bite into that "star" ring on the end of the barrel nut (on the receiver end of the barrel) thus removing the rotation problem.
Just shooting from the hip here buddy...hope some of this may help.
Here's a link to a diagram showing that parts of the AR upper to help you better describe your situation:
How to Keep Your AR Running, Part 2: Nomenclature and Cycle of Operation