How to Mount a Red Dot Sight on an AR 15 Rifle

Hi guys, here is how to mount a red dot sight on a AR 15 rifle in three easy steps. You might be wondering what the best way to go about mounting it is. I am gonna tell you the exact process that is used for mounting an optic on ar 15. It is super easy and honestly guys this is the process that can be used for mounting a red dot on any type of rifle. If you are ready then give me your full attention.

Step 1: Use Thread Locker

The first step of “How to mount a red dot sight” is to use a thread locker on the screws of your mount. As you know that the mount uses screws to attach the red dot to your rifle. So, what you need to do is just add a drop of blue lock tight to your threads. This is gonna keep your screws nice and snug, once you tighten it down. And you won’t have to worry about your optic working its way loose.

Step 2: Place the optic on Rifle

The second step of the How to Mount a red dot sight guide is to place the red dot sight on the forward end of your rifle top rail. There are two reasons, why I choose a forward mount on my red dot sight. The first reason is that I like having extra rail space behind my red dot scope, so I can mount things like backup iron sight or magnifiers if I want to extend my shooting range. The second reason is the eye relief of red dot sights. So, I like to give my eye a little bit of extra space to see what’s going on around me and have better situational awareness.

Step 3: Push the Optic Forward

The final step is to push the red dot optic forward as you tighten it down. So, what you need to understand is that your mount doesn’t fit perfectly in the Picatinny rail slots. There is always gonna be some wiggle there before you tighten it down. And because of inertia, when you fire your rifle then your optic works its way forward. So just push the optic forward and tighten it down. So, that’s it, your red dot sight is mounted rock solid and it is gonna stay in place on your rifle. The next thing you want to do is zero your red dot optic which is required for accurate shooting.


After reading this article, now you are able to properly mount your red dot sight on your AR-15 rifle. This step-by-step guide makes you an expert at mounting red dot optics on AR 15 rifle within minutes. If you have any questions or suggestions about “how to mount a red dot sight on an AR 15” then please let us know in the comment section.