EU - FastFire™ 4

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Everything you loved about the FastFire 3 plus...

  • Toggle between four different reticle options
  • Larger sight window for faster target acquisition
  • Longer battery life - up to 50k hours on medium brightness
  • Brighter aiming point
  • Optional screw-on weather shield for a completely enclosed sight
  • Auto-Brightness & Auto-shutoff after 8 hours


    Item Number
    Reticle Color(s)
    Combo Package
    Clear Objective Lens Diameter
    Field of View
    Close Focus
    Eye Relief
    Click Value
    Height Above Rail to Optic Centerline
    Elevation Adjustment, Total Capability
    Windage Adjustment
    Illumination Control
    Illumination Settings
    FastFire 4 Multi-Reticles
    Picatinny Mount / Doctor Optic
    1 MOA
    90 MOA
    90 MOA
    1.9 in.
    1.6 oz.
    FastFire Red Dot Sights
    FastFire 4 Manual
    June 9, 2021
    FastFire 2 Manual
    February 6, 2020
    FastFire 3 Manual
    October 29, 2015
    2020 Burris Optics Catalog
    February 10, 2020
    EU - FastFire™ 4 is rated 4.1 out of 5 by 511.
    Rated 5 out of 5 by from Couldn't Be Happier I love my fastfire 3. As soon as Burris placed the battery where it could be removed without removing the sight I was sold. Its low profile and handles the abuse of my shotgun. My only complaint is when its time to turn the sight off you have to click the button through all of its settings before it can be turned off. It only has 4 settings but that is a just more times a button gets pushed. Also the lowest brightness setting is last and hard to see the dot on bright day and you could think you have it turned off. I feel It should have a hold down 5 seconds to turn off and thats the only thing I would change. Its outstanding otherwise. Thanks Burris for the greatest customer service ever
    Date published: 2015-03-17
    Rated 4 out of 5 by from old eyes young again I bought a Fastfire II and Burris rear site dovetail base for my Ruger mark II pistol. My eyes are not young any longer and I could not be confident of hitting my targets with the sights on my pistol. The FastFire solved that problem in a very satisfying way. I liked the sight on the.22 so much, I bought another to mount on my Redhawk 44 mag. The FastFire has worked out just as well on the revolver as it has on my .22 pistol. Took the Redhawk deer hunting and shot 2 deer using the FastFire. It was an awesome experience. I'm very pleased with this sight, though not having to remove it from the mounting base to change battery would be nice.
    Date published: 2015-11-23
    Rated 5 out of 5 by from takes a licking and keeps on ticking Ifbought my fast fire six months ago. It sighted in as easy as any other red dot I have and is bright enough for any condition I have been in. When I was at my gun club last week the rifle that my ar-f3 was on feel out of the gun rack when I was at the bench shooting another rifle. The rifle with the ar-f3 on it fell about 4 feet and landed on concrete hitting the ar-f3 first. One of the protective wings was slightly bent in. Other than that the sight held zero and is working fine. I can't find any torture test reviews online for the fast fire 3 but if it can take that abuse and hold zero and work just fine I think that is all I can ask of a red dot sight to hold up to
    Date published: 2015-09-16
    Rated 5 out of 5 by from Tough little sight Simply put, this is an outstanding sight, especially for the money. I bought two; one for a Beretta Neos (with a non-moving rail), and one for a Glock 34. I was most concerned about the one which would be "riding the slide" on the Glock with regard to durability. My concerns were unfounded. Both sights have functioned perfectly. You'd expect the one on the .22 pistol to be fine, and it has. So has the one on the Glock. No blinking, no turning off, has held zero perfect through 450 rounds so far. I did take to care treat all screws with Loctite and to let it cure for a full 24 hours before shooting. I'm very glad I didn't buy more expensive red dots; there was absolutely no need. The lifetime warranty sealed the deal.
    Date published: 2015-02-27
    Rated 5 out of 5 by from Excellent product/value Bought this on Amazon to complement the AR 536 which is mounted on my Windham AR-15. It is very light weight and doesn't add much bulk to the sight. It is very well made. The auto brightness feature works very well and the windage and elevation are easily edjusted using a thin blade screwdriver. I read several reviews on the FastFire II and the biggest complaint was that you had to remove the sight to get to the battery compartment. The FastFire III has the battery compartment on top and that's why I chose that modle. I have fired approximately 500 rounds since adding the optic and it has held zero. I am very satisfied with this purchase and would recommend this to a friend. I could have spent more on another brand but so far I don't see the need.
    Date published: 2015-05-20
    Rated 5 out of 5 by from Great product Fits great on my Glock 35 M.O.S. I love the fact that it's small without being to small. The battery door on top is really nice, and sighting it in was quick and painless. Before I seen the Fastfire 3 I was about to purchase one that was over double the price. I had been looking for days trying to find a reflex sight for my new pistol. I was at my last store when I seen it in the case. I fell in love with it right away. It had all the features with half the price. If your looking for a reflex sight for home defense, and target shooting look no further then the Fastfire 3. It will not disappoint.
    Date published: 2016-02-24
    Rated 5 out of 5 by from Perfect co-witness on M&P Core I installed the Burris Fastfire 2 Red Dot in 15 minutes and within 20 had it It co-witness with no issues on a M&P core Ported 40 cal. 5 inch barrel. The main thing to remember when adjusting the sights is do do exactly what the instructions says to do. Loosen the locking screws by half a turn this will allow you to adjust the sight on the gun take it off with out any movement on the screws while you tighten back the locking screws. This sight is very small and easy to use. It is the same size as the Doctor red dot. The quality is great and I found no issues with the workmanship. The clarity of the lens is incredible. It comes with lifetime warranty and for under $200 I see no reason to spend money on optics that cost half of the gun. I really like that it has an off and on switch which is what I wanted. Tips for Co- Witness
    Date published: 2016-01-03
    Rated 5 out of 5 by from FastFire III/MTAC combination for the AR-15 A little over a year ago, I bought a Burris MTAC scope for my AR that came bundled with the FastFire red dot. Owing to family and work obligations, I didn't have the opportunity to really evaluate the system until quite recently. The scope was great, but I couldn't reliably turn on the FastFire, and it would often turn off with recoil. Not good. So I contacted Burris, concerned about a year having gone by. Burris immediately suggested I return the FastFire for evaluation and repair, preparing me for a several weeks turn around time. In a little more than a week, a new FastFire was returned to me (at no charge), and this one functions perfectly. I am very satisfied with the scope/dot combination. The quality and performance is top notch.
    Date published: 2014-10-08
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    Does the mount work on a Saiga AK47?

    Asked by: Rexxx
    The mount is for a picatinny rail. If your Saiga has a picatinny rail it will fit.
    Answered by: Burris Support
    Date published: 2021-06-07

    Would this fit a Glock 19 Gen 4 and 5?

    Asked by: Jon89
    The Fastfire RD will not fit those. You would need a Fastfire 3 or 4.
    Answered by: Burris Support
    Date published: 2021-06-07

    1)Hello,could you give me the dimensions of the sightscreen ? 2) Would the Fastfire 4 be compatible with the  Docter/Noblex mount ? (the Fastfire 3 was;I have one) Thanks;best regards

    Asked by: chasseur71
    They will still share the same footprint. As far as the window, it is 31.35mm on the one I just measured.
    Answered by: Burris Support
    Date published: 2021-06-04

    When is the FastFire 4 going to be available?

    Asked by: GunDad55
    They are currently shipping.
    Answered by: Burris Support
    Date published: 2021-06-01

    How can you make the red dot brighter?

    Asked by: Jim in ga
    The Fastfire II features auto brightness. There isn't a way to make it brighter typically. Sometimes, dust and debris can build up in the light sensor on the front of the sight. I recommend cleaning this little pinhole on the front of the sight with rubbing alcohol and a Q tip.
    Answered by: Burris Support
    Date published: 2021-06-01

    I purchased an aftermarket slide specifically cut for the Burris FF3 and I was wondering what is the proper height and size for the front and rear suppressor sights? Lastly I would prefer them in night sights so any recommendations would be appreciated.

    Asked by: JSteele
    We recommend suppressor sights from Dawson Precision. They'll have several heights available so you can custom tailor it to your application.
    Answered by: Burris Support
    Date published: 2021-05-24

    Is the Fastfire 4 compatible with Fastfire 3 mounts?

    Asked by: Tony1911
    It is compatible with all FF3 mounts minus the Picatinny Protector and AR-F3. The FF4 is too wide for those.
    Answered by: Burris Support
    Date published: 2021-05-24

    I have a Les Baer Custom 1911 pistol. I want to mount the Burris Fast Fire 4 by exchanging the rear dovetail sight of the Les Baer. What do I need to know?

    Asked by: dave71
    You'll need to call Les Baer and find out exactly what dovetail cut they used. If it is not one we offer a mount for you'll need to source one from
    Answered by: Burris Support
    Date published: 2021-05-24
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