Mounting an Eotech on an M4gery with a Larue Mount?

[Therapydude]

Greetings all! My new Colt LE6920 finally arrived last night, but I have a question about mounting my Eotech 551. I'm using a Larue Eotech mount and a Troy back up iron sight. From what I read on Larue's website, it seems that the iron sight should mount behind (i.e. closer to the charging handle) the Larue mount. When I tried this, however, there was not enough room for the sight to flip down. The Larue mount basically takes up the entire length of the flat-top, so I just mounted my iron sight on the Larue mount's picatinny rail. Everything lines up well, sight flips up and down. However, I was under the impression that the rail I used was reserved primarily for mounting a PVS-14 night vision monocular. I know that if I remove the Larue mount, the rear sight will be removed along with the Eotech, but I don't have any plans of removing the mount, especially since I can co-witness through the Eotech. Anyone have any experience/see any potential problems with this set-up? Thanks for any input provided.

 

[Therapydude]

Oops, nevermind! I just looked at a picture on AR15.com and realize that I mounted the rear sight backward (I have it folding forward instead of back towards the charging handle). Newbie screw up.

 

[stellarpod]

I was just about to suggest that you might have done that...



stellarpod

 

[Cesiumsponge]

Also remember the LaRue mount will raise the EOTech and the spendy and optional PVS-14 mounted to it 1/2" off the base rail on the upper receiver. If you mounted the rear BUIS to the LaRue mount, it will cowitness with your EOTech, but it will be 1/2" higher than the front sight post so you couldn't use the iron sights properly since the BUIS would be zeroed for something like 5 feet in front of your barrel .

The LaRue mount is designed to cowitness the EOTech holographic sight and the BUIS together, but with the BUIS on the lower 1/3 of the EOTech window due to the 1/2" rise. It makes those using a non-folding front sight block a bit less conspicuous when using the electronic sight.