Fiber Optic Front Sight for Ruger® Mark IV™ and 22/45™ Install Instructions
At a glance:
- Features highly visible fiber optic light tube for quick target acquisition
- Made of Aluminum for long lasting durability
- Includes red optic tube for customization
Supported Firearms:
- Ruger® Mark IV™ 22/45™ LITE
- Ruger® Mark III™ 22/45™ LITE
TANDEMKROSS sights are protected against mechanical failure for life by TANDEMKROSS’s Lifetime Guarantee. Fiber optic light pipes are highly susceptible to breaking within typical intended use and are guaranteed for the first six months after the time of purchase. Learn more about our warranty and returns policies here.

112 Reviews
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Best upgrade for a Ruger!
I really, really wish that Ruger would install fiber optic sights on Mk IV's and 22/45's at the factory, but since they don't this cheap and easy upgrade is the first thing that every Ruger owner should do once they buy their pistol. It's very easy to install and 1,000% better than the factory front sight. I recommend this to all Mk Series and 22/45 owners out there because it really does make a huge difference for the better.
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fiber optic
Great front sight easy to install
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Awesome replacement
Bought this for my Ruger Mark IV 22/45. It came with the regular black front sights. This is a awesome upgrade. Easy install.
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Review
Definite, significant improvement to my front sight, especially for my "old" eyes. Easy installation. I'm happy.
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Great quality
Really nice quality, nice and bright. Great upgrade to standard blade on mk4 lite
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fiber optic sight
Only took a couple of minutes to put on and it worked like it should. Quality was like everything else I've purchased from Tandemkross----PERFECT.
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Ruger Mark IV Tactical Front Sight
Very nice sight but too low for my Ruger Mark IV Tactical. I can only see about two thirds of the sight over the factory picatinny rail. I had to remove the rail to see the whole sight. Comparing it to the stock sight and a Williams fire sight shows that it s smaller. Could I have the wrong part or is this normal?
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Fiber optic front site review
This is the second one that I've purchased for my mark iv, I have one on my 10" stainless barrel and I just put one on my 4.5" threaded barrel and I'll be getting another one when I find a 6" ish competition barrel that I like if it doesn't already have a fiber optic site on it. I most definitely would tell anyone to buy one that needs a fiber optic front site! Also this works perfectly with the eagle eye peep site!
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Great Upgrade
This sight is a great upgrade to the original iron sights... the dot pops up and makes it very easy for the target acquisition. My son who shoots the Mark IV loves it.