I should have mine in next week and the sling a few days after that. I am wondering if it slides around on the buffer tube any?
Can't help there...I've never had a reason to modify or alter it in any way. It fit pretty easily from what I recall, and hasn't moved since. It might block the CTR that I have on there from moving forward all the way (don't recall for sure), but other than that, it's been great.
My mount came in today and I think it looks best the way you mounted yours and that's the way mine is on. Thanks again for posting the photo.