I have 6 of the one piece 7075 Geissele mounts. Haven't tried the 2099 yet. All have been perfect. Fit and finish are fantastic. I prefer running the S&B, CQBSS, and MK6 34mm mounts over the generic line of "AR15/AR10 mounts. Everything I have are all 34mm mounts. I do torque the mounts to the rail at 55 ft.lbs. And they return to zero flawlessly. I witness mark the ones on my KAC SR25's and they still shoot dead center even without having a torque wrench on hand. I prefer these Geissele mounts on all my gas guns and typically stick to standard rings (seekins) on my bolt rifles. What are you putting it on? These Geissele's dont have much choice in height, 1.54 I believe, and your stuck with 0moa on the SOCOM mounts or you can get the 20moa on the "standard" ones.