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FAB Defense Top Mounted Deployable Rear Sight
As Low As $15.49 Save Up to 74%
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Most Helpful Positive Review Not a bad sight
Not a bad sight.. Was looking for something different.. But I'd like it better if it was a button flip up like magpul.. It's a manual flip.. But looks great and works as it should.. Would recommend to others
Most Helpful Negative Review not good sight
The issue was that the rear sight shifted too far to one side on the rail when tightened even the slightest bit, causing near-maximum windage to find a zero (it is not an issue with the weapon). There is no spring assist either. These must be manually opened and closed, taking your hand out of a sho...
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Look Good, But Too Loose

by Cory Schoonover, from OK, United States Written on September 24, 2026
Way too loose on the standard rail I have. There was nothing that I saw in the description for me, that said it would not fit a standard picatinny rail. But it doesn't fit the rail of my CMMG Resolute Complete Upper.
Pros:
  • Pricing is fair
Cons:
  • Much too loose to fit a standard picatinny rail
Best Used for:
  • Not sure
Would recommend: No
Was it helpful to you? Yes | No

FAB Defence

by DD, Verified Owner from NC, United States Written on September 13, 2026
Not " pop-up " style, you have to manually deploy.OD color match was what I was after and was spot on. Quility and price good.
Would recommend: Yes
Was it helpful to you? Yes | No

Worth the price

by Robert, Verified Owner from WY, United States Written on August 16, 2026
It is easy to mount and use. Must purchase the front sight to use properly.
Would recommend: Yes
Was it helpful to you? Yes | No

they work.good price

by Felt, Verified Owner from VA, United States Written on August 4, 2026
Decent set of sights . For back up sights . They work right now. They were at a good price
Would recommend: Yes
Was it helpful to you? Yes | No

Not so great

by Todd, Verified Owner from SC, United States Written on July 28, 2026
Bought these on a cheap deal and they are alright. No spring assist and they are kind of hard to get up - they just feel very cheap which to be fair they were. I would just spend the little extra to buy the magpul ones next time. They look good, just don't function all that well.
Would recommend: No
Was it helpful to you? Yes | No

Its very funtional

by PapiJoe, Verified Owner from FL, United States Written on February 14, 2026
Its very funtional when you are using an optic or scope. Great for AR15's
Would recommend: Yes
0 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Smaller apertures

by Nehemiah Bianchi, Verified Owner from OH, United States Written on February 5, 2026
These buis are obviously not quite as good as magpul's polymer sights, but they do the job adequately especially for the price I got them at. 15.99 is more than acceptable when compared to regular asking price for the rear. My only "complaint" is that the apertures themselves feel delicate, however that's what the protective wings are there for so I wouldn't worry about them breaking.
Would recommend: Yes
Was it helpful to you? Yes | No

fab front/rear sights

by Mike O, Verified Owner from MS, United States Written on August 22, 2024
Nice, well made sights. Im very happy wiith these sights. Easy adjustments. Will buy more.
Would recommend: Yes
Was it helpful to you? Yes | No

Quality polymer sight

by E, Verified Owner from OK, United States Written on May 19, 2024
Quality seems to be on par with magpul. Sights are manual flip up and down and do not lock into place. Haven’t had any issues with them staying locked in place so I don’t see this as an issue at this point in time. Would buy again for bargain polymer sights.
Pros:
  • light weight
  • Low profile
Cons:
  • no lock in place when folded
Would recommend: Yes
Was it helpful to you? Yes | No

Best polymer sights for the money

by Eugene Moses Kalashnikov, Verified Owner from OH, United States Written on August 29, 2022
These come in at a great value in my opinion. I was a little hesitant at first because there is no manual locking mechanism for the sight in the upward position, meaning I'd like to have to push a button to fold them down, but my worries were eliminated once I felt how solid the lockup was. These detent nice and firm in the up and down positions. These sights are also easy to adjust, which brings me to my only con. The rear aperture is almost completely to the right for my to shoot to point of aim. This could be my pistol (300blk AR) but it seems strange for an AR to be that far right. All in all, I like them and the style happens to match my Sig Romeo5.
Pros:
  • value
  • Affordable
  • Stylish
  • Functional
Cons:
  • Adjustments far to right
Would recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2025-11-12 UTC.