Lead & Steel LBUS Polymer Sight Set

4.83 out of 5
(18 customer reviews)
sku: LBUS


In stock (can be backordered)

In stock (can be backordered)


This molded, impact-resistant Lead & Steel LBUS Polymer sight set is affordable & dependable.

Don’t let the price tag fool you!

This is a reliable set, guaranteed to hold zero, shot after shot.

Skip the Amazon garbage & get something that you can rely on without breaking the bank (they are backups, after all!).

Windage & elevation adjustment doesn’t need any special tools. Just like the dials used to adjust POI, the detents that secure the sights in the upright position are steel-reinforced.

For reference, overall footprint is similar to MAGPUL MBUS.

We’re really proud of these!

Let us know if you have any suggestions.

Additional information

Weight 3 oz

18 reviews for Lead & Steel LBUS Polymer Sight Set

  1. 5 out of 5


    Very satisfied with my purchase, they seem very durable and I tend to be harder on my guns than I’d like. A good alternative to mbus and at a great price point.

  2. 5 out of 5


    These back up sight are perfect for a budget build, they hold zero really well and are lightweight to boot!

  3. 5 out of 5

    Niko (verified owner)

    Extremely solid feeling and has no play whatsoever. I didn’t expect much when I ordered them but they feel better than my other polymer sights and they also sit lower on the rail, no space between the sight and the rail. Dare I say best polymer back up sights for the money out there? can’t just yet gotta go shooting with them first but first impressions are great.

  4. 3 out of 5

    Maxwell Jergerian (verified owner)

    These work as back-up sights but I’d plan on getting something more for a primary optic. Mine had a little bit of loose plastic shavings in the diopter on arrival. Super easy to install, no play once it’s on, and holds zero well. Feels sturdy for a polymer sight. Picking up the front sight is a bit more difficult on follow-up shots than I was expecting, but I’m sure that could be improved with a little bit of light-colored paint on the post – I just wish it were a little thicker. Overall 3/5 comparable to Magpul MBUS.

  5. 5 out of 5

    John (verified owner)

    Feel solid. Firm in either up or down position. What a value these things are

  6. 5 out of 5

    John D. (verified owner)

    I like these! A bit larger than the metal MBUIS they replaced but not by much and they were MUCH less expensive.

  7. 5 out of 5

    Anonymous (verified owner)

  8. 5 out of 5

    Trent G. (verified owner)

    All items arrived and included everything ordered, plus some extra merch.

  9. 5 out of 5

    Seth M. (verified owner)

  10. 5 out of 5

    Anonymous (verified owner)

  11. 5 out of 5

    Hammaad Amin (verified owner)

    Solid! Would love a quick-ready system for the next iteration but this is superb already!

  12. 5 out of 5

    John B. (verified owner)

    Feel quality, excellent price…not much time behind them yet but I’m happy with the purchase.

  13. 5 out of 5

    Anonymous (verified owner)

  14. 5 out of 5

    Kay (verified owner)

    Great set of back up iron sights for the price. They were easy to mount, secure, and sight in. I found these sights to be very accurate and hold zero just fine.

    My only “complaint” is that these are manually flipped up sights, and this is very minor. For their use as back ups, I am very happy with the purchase.

  15. 5 out of 5

    Anonymous (verified owner)

    Very nice!

  16. 5 out of 5

    Christopher (verified owner)

    Really solid BUIS for the price. They feel comparable to Magpul’s offering for much cheaper. Buy these and an extra box of ammo instead of the MBUS.

    FYI, per L&S CS, the front sight post is proprietary, so upgrades from companies like Blitzkrieg will not work.

  17. 5 out of 5

    Brandon V. (verified owner)

    I really enjoy seeing new companies coming up and providing quality products that are competitive with more established brands. You guys really seem to understand what people need and want and I hope to do more business with L&S in the future.

  18. 4 out of 5

    Jordan (verified owner)

    Good quality but the rear sits higher than I’d like – too thick for some optics of you aren’t using a higher mount.

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