Installed an RMR on my FN 5.7 pistol (AR-15, loaded, bullet)

[titaniummd]

Having an extra RMR I wanted to see how this performed. I have used red dot sights on my 5.7. There isn't a lot of third party aftermarket parts. I didn't want a slide milled since there is a polymer shell.

Well, the newer design just requires removal of the rear sight.

Tools I needed:

Precision mallet
1/16 punch to remove the pin
Flat head screwdriver
Blue Locktite
Bench vise to compress the roll pin.
3/32 roll pin punch
Lots of oil

The easiest part is removing the rear sight. Use a 1/16 punch to remove the pin. Screwdriver to remove the rear sight.
Screwdriver to attach the mount. Then, I tried to punch the roll pin without compressing. That didn't work. I used the bench vise to compress the roll pin. Then I used a 3/32 punch and gently tapped it through.

Blue Locktite to secure the RMR to the mount.



I set up the RMR for 25 yards. Was able to shoot it out to 50 yards very easily. It's a flat shooter even at 75 yards.

I was able to hit 150 yard plates, also, with a slight holdover.

With the RMR the target acquisition it fast, and it is consistent. No issues with reliability with the gun at all. Not with an RMR. I used SS197.



I'll tell you that ASTIGMATISM is the major limiting condition that may hinder your ability using a red dot/reflex sight.


Instagram: MuzzleblastMD

[Maccabee 2A]

Wow! I didn't realized how wide the magazine is.

[1AngryTaxPayer]

Beautiful. I need to find something like that for my .40 SW.

[titaniummd]

Originally Posted by Maccabee 2A

Wow! I didn't realized how wide the magazine is.

It's long because the rounds are long. It holds 20 rounds and yet it's still lighter than a Glock 19 when loaded.

[titaniummd]

Originally Posted by 1AngryTaxPayer

Beautiful. I need to find something like that for my .40 SW.

Who makes your 0.40?

There are aftermarket parts for Glocks, as well. They run about $45$55.

I wish there was one for an FN FNP 45 (non-tactical).

[ScoPro]

That's a very cool setup and a well done photo installation manual.

[titaniummd]

Originally Posted by ScoPro

That's a very cool setup and a well done photo installation manual.

Thanks. I just wanted someone to learn that it takes the right tools. I made a few AR-15s so I had everything.

Shooting with a red dot is like a night and day difference. If you can hold a gun steady you can hit virtually any target, accounting for bullet drop at various distances.