I have an Aimpoint ML3 with an Aimpoint 3x magnifier in a Larue mount. Only had it a few months but so far I'm liking it a lot. The magnifier hangs over on the R-hand side of the rifle not deployed so that COULD be an issue. It gets in my way doing my ejection port check after firing a string of shots, you just have to cant the rifle a tad more. That setup gives a lot of versatility, IMO.