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1911 Modular Rear Sight

  • Complete Modular Rear Sight installed on Colt 1911.
  • Base, 2 set screws, and pan head screw for attachment of sight leaf.
  • Sight Leaf
  • Top: LPA adjustable sight, Bottom: Bomar base Modular Rear Sight.  

Note that the small triangular dovetail of the Bomar (bottom) is set farther forward than the LPA (top).
  • Complete Modular Rear Sight installed on Colt 1911.
  • Complete Modular Rear Sight installed on Colt 1911.
  • Complete Modular Rear Sight installed on Colt 1911.
Calculated at checkout

Product Description

1911 Modular Rear Sight.  Replaces adjustable rear sights with a unique 2 piece design that allows the sight to be installed in the pocket cuts popular in custom 1911s.  The design permits easy swapping of the removable, interchangeable sight leaf while the base remains in place on the pistol.  The user can easily swap out the sight leaf with only a flat head screwdriver or the rim of a .45 cartridge casing.  The height of the rear sight blade approximates .325" "standard" height 1911 LoMount rear sights, and permits use of existing front sights.  Once installed, this sight behaves as a fixed sight.

Fits Bomar base fits guns with Bomar style adjustable rear sights, including Les Baer, STI Trojan, Springfield Armory TRP Operator, Colt Gold Cup, Ed Brown, and countless others.  If you are not sure which base your pistol has, we suggest contacting the manufacturer.  You can also check the photo gallery to compare the dovetail to your existing sight.

Complete sight kit includes base, leaf, two set screws and wrench for base, custom pan head screw for sight leaf.  The following combinations may also be ordered separately: Sight leaf only, leaf screw only.


*Please note that factory installed Bomar style rear sights on Colt Series 80 and Sig adjustable sight 1911s will sit more to the rear, and may touch the hammer.  The sight blade or the top of the hammer can be clearanced to alleviate any issues on such models, but our sight will otherwise not be a direct fit.


**If you are uncertain what rear sight style is on your gun, and the photo gallery here has not helped you decide, please contact the manufacturer of your gun to ask what is on there.  We do not know what all the countless different models of 1911s have as their adjustable rear sight, and would not want to steer you wrong based on a guess or a potentially outdated website picture on the manufacturer's site.  


***Does not fit LPA dovetails, which look similar to the Bomar, and are used on most Springfield adjustable sight 1911 models, including Loaded, Trophy Match and Range Officer Models.

***Does not fit Kimber adjustable sight models.  Their dovetail is very close to a Bomar, but it is longer in the front.


Product Videos

10-8 Performance 1911 Modular Rear Sight (04:28)
The 10-8 Performance 1911 Modular Rear Sight replaces common adjustable rear sights with a durable fixed rear sight. Unique 2 piece design installs into existing pocket cuts and permits easy exchange of the sight blade.
  • 10-8 Performan...
    The 10-8 Performance 1911 Modular Rear Sight replaces common a...

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Product Reviews

  1. It’s beginning to get boring... 5 Star Review

    Posted by on 16th May 2019

    How good 10-8’s 1911 stuff is. I have both .156 and .140 width notches. Both are bomber options to replace what comes on the TRP Operator from SA. .156 is fast as all get out, still good at distance. The .140 is still fast, but noticeably better at distance. I prefer the .140. Get both and see what you like better.

  2. rear leaf screw keeps falling out 3 Star Review

    Posted by on 2nd Mar 2018

    Great sight picture but almost lostcrear leaf when retaining screw worked loose. Replacement also was working loose and had to Loctite screw. Should be a warning about this!!!

  3. 10-8 does it again!!! 5 Star Review

    Posted by on 15th Apr 2017

    The factory adjustable sight on the Springfield TRP is a decent sight. The down side is it is sharp on the edges. But is has tritium inserts and is well.. adjustable. For me I prefer blacked out rear sights to make that front sight pop... I am helped by the deeper wider .156 notch on the 10-8 sight. Once installed the sights pick up faster and with the smoothed edges and low profile make manipulations of the slide much easier. The fit and finishe are outstanding and typical of 10-8's attention to detail. I have 10-8 sights on all my guns and this system for the TRP is top notch!!!

  4. Solid sight replacement, just buy it 5 Star Review

    Posted by on 16th Oct 2015

    Replaced the factory adjustable sight on my Dan Wesson PM9 and I have to say I am glad I took a chance. The adjustable sight on the PM9 is a good sight, however I never used the adjustments. The 10-8 modular sight offers a very quick sight acquisition because the rear sight notch is deeper than the factory which makes it much easier to see and track the front sight. Will be buying another on to install on my TRP.

  5. The more you look, the better it looks. 5 Star Review

    Posted by on 23rd May 2013

    Easily installed, and super cool. Went right in a Bomar cut with no issues. Looks a little funky at first, but the appearance grows on you.

  6. Beat my expectations 5 Star Review

    Posted by on 9th May 2013

    I've heard lots of good things about 10-8, and if this is indicative of all the work they do, buy with confidence. This sight took me from thinking about selling my 1911, to it being one of my favorite guns. Found out the hard way that I don't really like bomars all that much, but this sight fixed that problem perfectly. Thanks for the fast shipping too.

  7. Fantastic 5 Star Review

    Posted by on 6th Nov 2012

    Replaced my factory adjustable in my full rail operator with the 10-8 sight. The dovetail on the sight base is cut large, so I had to take down the angles and the flat on the bottom. Overall, I am very satisfied, and will buy one again if I ever have another Bomar sight base.

  8. Bomar modular sight 5 Star Review

    Posted by on 7th Jun 2012

    Great sight. I think that the front corner of the base could be rounded off a little. Other than that the sights worked perfect from the first shot out of my trp operator. I have been waiting for a replacement sight like this for a long time. I stopped shooting my trp operator because of the adjustable sight that it came with. Why would you put that sight on a tactical weapon like that. The 10-8 bomar modular sight has relit the fire for my passion to shoot this gun again. Bravo on another fine product.

  9. 10-8 Modular Rear Sight 4 Star Review

    Posted by on 5th Jun 2012

    This is a great fixed sight replacement for the Bo-Mar adjustable rear sight. It is solid and offers the typical 10-8 sight picture. I installed it on my Springfield TRP Operator. I can finally run malfunction drills on that gun and not get lacerated from the stock adjustable rear sight!

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