There should be 2 roll pins on your front sight post that you can pop out, and slide the front sight off over your barrel (you will have to remove your flash hider as well). I installed a 4 way rail on my RRA when I did this, so if I ever get the funds to blow on a new front flipup sight I'll be ready to go.
Before
After
Good choice on the EOTech you are going to love it! It's the ultimate AR sight if you ask me. Works great out of the pickup window on coyotes and jackrabbits
