Ok I was looking at buying one of these to put on my Smith & Wesson MP-15 (the one with the magpul furniture). The problem I am seeing is that most of the mounts I have looked at have a 1.5" centerline (of scope) height over the rail which doesnt clear the mbus rear sight that came with the rifle and are a little less expensive (say a hundred). The only option I am seeing is the LaRue Lt 135 with a 1.93 centerline. For a gaming gun I dont NEED back up sights, but I would like to have them available. Would I be better off to spent that extra hundred dollars (plus or minus some) to get another back up sight (assuming I can figure out one that fits under a 1.5" scope center line), go without back up sights and just run a 1.5 " (and cheaper, say the armalite) mount, or just go ahead and get the LaRue?
How are you guys mounting yours, and are they working with a backup sight setup?
Yes mincing arround over $100 is stupid, but I dont want to have to purchase things twice and I want the setup to work right the first time.