Burris FastFire II on M&P Performance Center C.O.R.E.

JLLNet · Feb 15, 2016

Just got my hands on this red do sight to put on my new 4.25" pistol. I'm new to shooting as well.

First of all, once the sight is mounted, the rear iron sight will not allow to adjust the red dot sigh

Also it takes like a minute for the red dot sight to appear when you first turn it now.

And it kinda takes a while to really synchronize and level the dot with the front sight and then I always end up shooting low from the target mark.

Is it because I'm a newbie or is because this red dot sight is low quality?

Please your thoughts before I return it or simply learn to live with it ? See the pictures attached

Thank you

retired2006 · Feb 15, 2016

I have used both the Burris Fastfire 2 and the Fastfire 3. The 3 is far superior IMO, it has auto brightness, and a manual mode, battery replacement w/o removing the red dot from the mount, and you can adjust it like a scope, no set screws.
Any red dot requires some "getting used to" on the part of the user, but most people will adjust and then be pleased with the outcome, they are a lot more accurate sighting system.

V0OBWxZS16 · Feb 15, 2016

The RDS should turn on immediately. If it is not doing so return it or contact Burris for repair.

The red dot is independent of the iron sights. There is no need to line the dot up with the irons when aiming. The dot can be floating anywhere in the window.

Shooting low is a common malady and can be caused by either a bad zero or the shooter. Work on your dry fire and ball & dummy drills. Shoot it from a rest or have another shooter fire it to check the zero.

JLLNet · Feb 15, 2016

V0OBWxZS16 said:
The RDS should turn on immediately. If it is not doing so return it or contact Burris for repair.

The red dot is independent of the iron sights. There is no need to line the dot up with the irons when aiming. The dot can be floating anywhere in the window.

Shooting low is a common malady and can be caused by either a bad zero or the shooter. Work on your dry fire and ball & dummy drills. Shoot it from a rest or have another shooter fire it to check the zero.

Thanks for for the comment, maybe a bad sight because it doesn't come up immediately so this is bad.

JLLNet · Feb 18, 2016

I found out that I was missing a rubber gasket that needs to also be installed between the battery compartment and the frame, apparently that was causing some grounding issue.

Now it does come up immediately after pressing the on button.

I will report back my experience at the range once I get to practice this weeken.

JCase · Feb 18, 2016

Does either the II or III cowitness on the core?

Walton Feep · Feb 19, 2016

I have the same setup.

There is nothing wrong with the sight. I don't use the rubber gasket but I believe the delay when you turn it on is because is has to sense the light level (tiny lens on the front of the sight below the main lens) and adjust the dot intensity. This is automatic. I have several FFIIIs and an FFII and they all work this way. The FFIII also allows you to manually adjust the intensity.

For the locking screws on the rear of the sight, loosen them first. Install the sight. Take it to the range and zero it. Remove the sight and tighten the locking screws. Use blue Loctite on the mounting screws and remount it.

As far as co-witnessing, the FFII will work with the CORE. The FFIII will not co-witness as well but it is usable. Most of the rear sight is obscured but enough of it is visible along with the white line on the rear of the FFIII to allow you to lineup the line, the tops of the rear sight, and the front post.

As far as aim, I wouldn't worry about the iron sights at all when using the dot. Sight the dot in at your desired distance and shoot with both eyes open and focused on the target. That is the whole idea of the dot. The iron sights are backups at this point. They will be close but aren't necessarily in perfect alignment with the dot at your desired distance. They also are useful for helping locate the dot if you are having trouble - "hunting the dot" they call it.

JLLNet · Feb 19, 2016

Thanks for the reply.

You're right, it does seem to take a few seconds to capture the light, Yeah it took me a little while to zero the sight and I think that I finally got it zero in. It its a hassle because since there is no room to unscrew the adjusting screws, the sight must be removed completely.

I'm getting happy with the setup, the cowitness is there but we just need to follow the red dot to hit the mark. I will shoot another 1,000 rounds this weekend, but last night I was able to hit the mark.

Thanks

JLLNet · Feb 22, 2016

Well if anybody cares to read this post and if not too old.

I finally got my CORE 9mm setup with the Burris FastFire II, after doing the research.

I'm very please with the accuracy, but it did take some time in adjusting the red dot, and it does cowitness with the iron sights, but at the end that doesn't even matter because you cannot line up the red dot to the iron sight to hit the mark. You have to ignore the iron sights completely if not it will not work. I guess the cowitness can help if the red dot goes out of line or dies due to dead battery, but you must shoot by following the red dot.

It is the biggest hassle for adjusting the sight because the rear iron sight will not allow you to reach the locking screws for adjusting the sight, so this is a pain, but hopefully don't have to adjust it often.

Other than that, the sight acquires the red dot fairly easy, must learn to have patience and control your hand movement, etc. cause you can easily go from hitting the bullseye to completely be offsite if not well controlled.

For the almost $200 that I paid for the sight, I'm happy with the the mo4 is bright and big enough.

Now I will see how reliable this sight will be because I use it every time I shoot, and hopefully the on-off switch will not go bad on me, and I hope that it will stand the cleaning products that I use with the pistol...

I will recommend for anyone who doesn't have the $$ to buy the expensive options such as the Trijicon and Leupold.

Walton Feep · Feb 22, 2016

I think you will find it reliable. I've had one come off the slide (due to my own error in mounting) and hit me in the forehead before bouncing on the concrete shooting pad. I reinstalled it (properly this time) and it works fine. I have several and shoot them on everything from 22lr to .357 magnum. Not one failure yet.

I always put the cover on before cleaning the gun to keep solvent off the RDS. When done you can rinse the plastic cover off and soap and water.

JLLNet · Mar 8, 2016

JCase said:
Does either the II or III cowitness on the core?

Only the FFII cowitness due to being very low profile, but it is a pain when adjusting the zero for the first time because the rear iron sight obstruct the access to the screws,but honestly once you start shooting with it, you forget about the iron sights, only follow the red dot..

JCMIA · Mar 9, 2016

I love my FastfireII.

Burris FastFire II on M&P Performance Center C.O.R.E.

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