Hello all! First post. Please bear with me. I have a Sig M400 5.56x45, and a Windham 7.62x39. I finally took the plunge and bought a Windham 308. I got all of my accessories to make it mine (quad-rail, foregrip, etc.), and a Nikon ProStaff 3-9X40 BDC scope. I took it out a week ago. Got a nice big bruise on my cheek. I had to roll my head sideways trying to get a good sight picture on it, and it bit me good. Several times. I am thinking my scope may be mounted too low. The eyepiece is flush with the charging handle to the rear, so I may even have it mounted incorrectly to the rear. I just don't know. I am trying to figure it out, but this is my first relatively high magnification scope, and I want to make sure I don't keep throwing money at mounts, etc. if they are not the root of the problem. I am hoping that those of you on this board with more experience can show me the light! I bow to your experience! Regards, OldSarge