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Thread: AKS-74U..Anyone know the purpose of the slots cut in the sight rail?

  1. #1
    Registered User timkel's Avatar
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    AKS-74U..Anyone know the purpose of the slots cut in the sight rail?

    What is the purpose of the slots? Was there some kind of optic that mounted via the slots? See pics.




  2. #2
    Registered User Uncle Billy's Avatar
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    it looks way too small and not nearly deep enough for anything like a optic to go on it, in any event I have never seen anything that was attached to the top of the rear sight in the variety of pictures of Soviet/Russian soldiers with one. probably just a remnant of the pressing process to make that piece

  3. #3
    Registered User OldBesty's Avatar
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    egress for rain.

    B-18 rails mount rear sight for optics.

  4. #4
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    Is it the piece of spring spring steel that presses up against the bottom of the rear sight? If so then it’s done too reduce force and induce the bending moving localized to that area

  5. #5
    Registered User Uncle Billy's Avatar
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    Quote Originally Posted by OldBesty View Post

    B-18 rails mount rear sight for optics.

    I would say you might be on to something.......except that the B18 rail came some 40 years after the AKS-74u was fielded, so there is no way that is what it is.

    besides the B18 rail is attached to the side of the rear sight, not in those "cut outs"

    see for yourself

    https://4shooters.com/product/zenitc...rail-aksu.html
    Last edited by Uncle Billy; 07-20-2021 at 11:56 AM.

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    A lot of times during development and early T&E ideas are tried but rejected. "It seemed like a good idea at the time"...

    So it is quite possible an attachment, optical or otherwise, was intended to be mounted there but was dropped at some point. If the tooling is already made to make those in the sight base when it is stamped out, why spend the time and money to redo or replace the dies to eliminate them?

  7. #7
    Registered User OldBesty's Avatar
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    Quote Originally Posted by Uncle Billy View Post
    I would say you might be on to something.......except that the B18 rail came some 40 years after the AKS-74u was fielded, so there is no way that is what it is.

    besides the B18 rail is attached to the side of the rear sight, not in those "cut outs.

    see for yourself

    https://4shooters.com/product/zenitc...rail-aksu.html
    Tooting your own horn again, buddy. I clearly stated the slots were for "rain egress". B18 was mentioned solely for if the OP was seeking an optic rail option that mounts to the rear sight. StormWerkz has also manufactured a product, but it requires drilling.

  8. #8
    Registered User NorincoKid's Avatar
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    I've had my Krinkov kit in a box here for awhile waiting for me to get around to filing the paperwork to SBR and build it.

    I was just going to put an AK74 side rail on it when I put it together. The forward-most rivet for the folder trunnion is same location as fixed stock 74.

    I didn't think those slots were for an optic, drainage makes sense though.

  9. #9
    Registered User Deerhurst's Avatar
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    You are all probably over thinking this. Most likely a relief cut for the bending process.

    My AKSU has a gen 2 dust cover so I cannot confirm this.

  10. #10
    Registered User timkel's Avatar
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    The slots were cut with precision. I believe there was a mount for some kind of sight, dot, ect. But I cannot find any reference to one.

  11. #11
    Registered User NorincoKid's Avatar
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    Mine don't look to be precision cut, or well machined for that matter. If it is cut for an optic mount, it must be a pretty wonky, uneven base that goes in there.




  12. #12
    Registered User timkel's Avatar
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    I found this pic in a Russian AKS-74U manual. I'll get #4 translated.

  13. #13
    Registered User NorincoKid's Avatar
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    Not sure how accurate that is.

    Maybe for clip on tritium night sights?

  14. #14
    Registered User timkel's Avatar
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    Quote Originally Posted by NorincoKid View Post


    Not sure how accurate that is.

    Maybe for clip on tritium night sights?
    That's what I needed, Thanks.

  15. #15
    Registered User OldBesty's Avatar
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    Quote Originally Posted by NorincoKid View Post


    Not sure how accurate that is.

    Maybe for clip on tritium night sights?
    +1 (for correct answer: AKS-74UB variants reportedly had tritium sight attachments)

  16. #16
    Registered User timkel's Avatar
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    some pics of the AKS-74U "night fire appliance"
    Last edited by timkel; 08-08-2021 at 02:15 PM. Reason: better diagram

  17. #17
    Registered User OldBesty's Avatar
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    first time seeing one. quite cool

  18. #18
    Registered User Deerhurst's Avatar
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    Well that's freaking cool! Reminds me of my east German night sights!

  19. #19
    Registered User timkel's Avatar
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    update- there was also an optical sight issued in the 90's that attached in the sight rail. It was determined to be failure and withdrawn from service.

  20. #20
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    Looks like divots to hold a leaf spring that drives flip up tangent sights.

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