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1911 Low Mount Rear Sight

  • To determine the rear sight height that you need, measure the rear blade as shown.  We do not know what height you have on YOUR gun, some manufacturers have variance between individual guns of the same model.
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Product Description

The 10-8 Performance rear sight is precision CNC machined from heat treated 4140 bar stock to better resist the nicking and denting that is typical with the wear and tear of daily carry. All 10-8 sights feature a U notch for rapid, intuitive alignment with dot such as on our tritium insert and fiber optic front sights. The rear face is serrated at 40 lpi to reduce glare in varied lighting conditions.  The sight blade is thick enough to allow setting in tritium vials as dots or bars if one so chooses, but we recommend leaving them without inserts in order to draw the eye toward the front sight.  The sight body is contoured and dehorned for comfortable handling and carry.  All rear sights feature a plain black blade finished in matte black oxide. 

  • FITS: Novak LoMount ® dovetail
  • Notch widths:
    • .125" - preferred for greatest accuracy
    • .140" - most popular, good all purpose width
    • .156" - fastest notch for .125" wide front blades or XS Dot front sights
      • Choose the .156" notch, .325" height to use with the XS Standard Dot for 1911, which is .185" tall.

Most factory sight setups feature a rear notch that is the same width as the front blade - ie. typically a .125" wide rear notch with .125" wide front sight.  This type of setup provides a relatively tight visual window that optimizes precision for maximum accuracy.  For most shooters with good vision, this combination works fine.  An increasingly popular combination is the .140" rear notch with a .125" width front blade.  For most shooters, this combination offers improved speed on close range targets without degrading perceived accuracy out to 25 yards.  The .156" extra wide notch is compatible with the XS Standard Dot (.110” width) or XS Big Dot (.161” width)  front sights, and also makes for a very quick combination in conjunction with our .125" wide front sights.  Our recommended "signature" set is the .140" wide rear notch with a .100" wide fiber optic front, or the .156" rear with the .125" brass bead front.

Our 02 series sights will fit into the popular Novak LoMount ® dovetail, which is found on fixed sight 1911s offered by Wilson Combat, Rock River, Dan Wesson, Ed Brown, Springfield Armory, Colt (XSE series, Gunsite, Rail Gun, M45, Defender), Nighthawk, Les Baer, DoubleStar, STI, Sig (GSR and 1911s), Rock Island Armory, Ruger, and others.  They will fit your slide with only hand fitting of the sight if the dovetail is already cut, otherwise your slide will need to be machined.  

**The 02 series sights DO NOT fit: Kimber, ParaOrdnance, Taurus, Magnum Research, or S&W 1911s.  The Kimber and Magnum Research 1911s take our Kimber Front and Rear Sights.

The rear sights are available in heights to match your existing rear sight height, and will therefore be directly compatible with your existing front sight.  You will want to measure your existing rear sight before ordering.  If your gun already has a LoMount style rear sight on it, our rear sight will be directly compatible with your existing front sight in both height and width.

Please note that Springfield Armory fixed sight 1911s (Loaded, TRP, Professional, EMP) use both .325" and .375" tall sights.  It is not possible for us to predict what is on your gun, as each individual sample can vary without regard for model number etc.  It is best for you to measure the sight on YOUR gun to be sure.

Choose from .325" ("standard") blade height or .375" ("extra tall") blade height (most common on Officer/Defender length 1911s or various Springfield fixed sight 1911s). The .375" is now only available in .140" notch.

The left front of the sight has a small angle machined into it. This is for easier installation, and is not a machining error.

Please note that 1911 Low Mount dovetails vary wildly in dimensions. Our sights are meant to provide an interference fit, and not be dependent on the set screw for retention. It is not uncommon for some dovetails to be too large for our sight. 


Read our article about selecting sights.

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Product Reviews

Showing reviews 1-10 of 53 | Next

  1. Quality sight with good results 5 Star Review

    Posted by on 27th Feb 2018

    I have a Springfield Loaded 45 with 5 inch barrel. It was grouping several inches below my 6 o'clock hold. It has the .325" rear sight. I purchased the .375" rear sight to raise my POI. This sight raised my POI an inch or two above 6 o'clock, which translates into placing the groupings where I want them to be.

    This is a quality sight. It is my first sight with a U notch. The front sight settles quickly to the center of the notch with plenty of daylight on each side of the sight. The .140 notch perfectly compliments the stock front sight. Fast shipping too. A satisfied first-time customer.

  2. Fiber Optic - terrific sight 4 Star Review

    Posted by on 11th Jun 2017

    After installing the fiber optic front and all black rear sights on my 1911 and Glock, I wish I made the transition years ago. This combination is, by far, the fastest I've used. Easy to acquire from the holster, tracks well during recoil, and the narrow front post is a bonus on small targets at distance. Well done, 10-8.

  3. Low Mount Rear Site 5 Star Review

    Posted by on 6th May 2017

    Perfect fit and easy install. Changed bullet impact from "6 o'clock hold" to POA on the Springfield EMP4 9mm.

  4. Worker not WOWer 5 Star Review

    Posted by on 6th Dec 2016

    The sight is rock solid and tough. Cuts are clean. There is nothing that makes this sight pop out at you, but that's exactly what I want. It's plane jane in my sight alignment, forcing my eye through the u-notch to my front-sight. The .125 cut helps me run my pistol more effectively.

  5. Excellent rear sight 5 Star Review

    Posted by on 6th Nov 2016

    A rear sight should not grab your attention. This sight provides a nice portal through which the front sight can be sharply focused.

    Looks tough and you can rack your slide with it like all those 5.11 wearing YouTube experts say you should.

    If this doesn't fit the Novak dovetail on your 1911, it's your 1911 that sucks.

  6. Sphinx rear sight replacement 5 Star Review

    Posted by on 22nd Aug 2016

    Bought this to rectify the problem of my Sphinx SDP shooting to low. The .325" X .140" sight was just three right height to make the point of aim the same as point of impact. The sight was loose in the dovetail which was not the fault of the sight but just a little peening took care of the problem. Mission accomplished. Thanks 10-8

  7. Heck yeah !! 5 Star Review

    Posted by on 3rd Aug 2016

    Perfect fit and function for my Springfield Armory Lightweight champion operator. Paired this rear with a Dawson precision front fiber optic and its perfect combination for me . Really helped with my accuracy since I can finally see the front sight . Thanks 10-8 !

  8. Dependable 5 Star Review

    Posted by on 23rd May 2016

    Sights are some of the first changes any serious shooter will make to their firearm. Doesn't matter why you shoot competition, LEO/MIL, personal defense/offense. If you want to get the most out that investment upgrade the sights. I chose this set because of 10-8's reputation for having dependable parts that work. I have their National Match rear sight on another 1911 and now I have this one. Easy to install if you take your time and are fairly competent with hand tools and understand what you're doing. They fit well and work perfectly. This rear sight replace the adjustable rear sight that has the two springs. Too many moving parts too many ways to go wrong. Upgraded sights don't make you a better shooter, they make the pistol more "shootable".

  9. As it's written. 5 Star Review

    Posted by on 10th May 2016

    .325/.140 U notch rear sight. Just what I've been looking for. Excellent fit for my SIG Nightmare Carry. Works with the factory front sight. Allows one handed munipulation. Completes my EDC pistol. Great value. Thanks 10-8.

  10. Essential upgrade. 5 Star Review

    Posted by on 14th Feb 2016

    I have used 10-8 sights on my 1911 for a few years now. I recent upgraded the rear sight on my Springfield EMP 4" with installing the .325/ .140 U knotch. It gives my favorite sight picture and shoots POA at 10 yards with S&B or Geco 115gr.

Showing reviews 1-10 of 53 | Next

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