I can tell you from using the Vltor E-Mod, Magpul CTR, SL, SL-S, PRS Lite, Bravo B5, and BCM SOPMOD Mod 1 on accurized AR-15's, I'm liking this one a lot. As I mentioned before, my CTR locks up tighter but the amount of movement I'm talking about is a fore and aft movement of about .020", which...