I was at the gunshow this weekend and I picked up a NC STAR 3x9x42 scope for my 16" AR.
I didn't realize NC Star had such a bad rap on AR15.com until I got online and read up. Needless to say, I had already purchased the scope.
Anyway, I got it mounted and I ZEROED it at 50 yds. I was hitting excatly what I was aiming at everytime I pulled the trigger. It was sweet........Then, several shots later, I was hitting 3-4 inches low.......turns out, the knob that tightens the scope to the carry handle had become loose.
I would tighten the knob as tight as I could get it....keep shhoting and after approx. 15-20 rnds, it would get loose again.
My question is, How can I tighten it so that it stays tight??????.........Its very frustrating to zero your weapon just the way you like it and then loose zero.
Thanks,
GhostCat