I used a Cherokee cheek riser on my rifle when it had an A2 stock. This made it nearly impossible to use the irons if I needed/wanted to. The last optic I used was a Millett DMS-1 and a Magpul PRS stock. It's nice being able to adjust the stock for the perfect cheek weld, and also being able to crank it back down for iron sight use. The DMS-1 was just sold for a Burris Timberline 2-7x26 with the ballsitic plex reticle. The DMS was an ok optic. It was ok for close shooting, but was no red-dot (there was a lot of eyepiece blocking the view, and there was a bit of fish-eye at low mags), and it was ok for target shooting, but lacked some precision, was a little low in magnification for my tastes, and had no hold-over lines or target turrets. The Timberline suits my uses better, and I plan on putting a reflex sight atop it when I can afford it. Best of all is that it's a full 2" shorter than the DMS and a bit lighter as well, with a better eye relief range.