Quantcast
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Using a 1-4x scope with BUIS

Discussion in 'Rifle Country' started by Mags, Mar 17, 2010.

Thread Status:
Not open for further replies.
  1. Mags

    Mags Member

    Joined:
    Apr 8, 2009
    Messages:
    3,235
    Location:
    Belgium
    Before I pull the trigger on a 1-4x AR scope is it possible to get a decent co-witness with BUIS with the scope set on 1x? My two concerns are the length of the scope tube could give you a tunnel effect and what heigth of a ring gives a good cowitness with 1-4 type scope? If using BUIS with the scope mounted is not an option I would consider mounting the scope with a quick release mount.
     
  2. Uncle Mike

    Uncle Mike Member

    Joined:
    Nov 5, 2008
    Messages:
    3,129
    Location:
    never never land...never land here!
    I can't....
     
  3. Mags

    Mags Member

    Joined:
    Apr 8, 2009
    Messages:
    3,235
    Location:
    Belgium
    What is that supposed to mean?
     
  4. Avenger29

    Avenger29 Member

    Joined:
    Jun 2, 2005
    Messages:
    2,728
    Location:
    SC
    I'm 99% sure you can't do that with a scope, even set on 1x. Only optics such as Aimpoints/Eotechs...

    A QR mount is the way to go, with folding BUIS. You know, I'm sure, of LaRue, ADM, etc...
     
  5. Uncle Mike

    Uncle Mike Member

    Joined:
    Nov 5, 2008
    Messages:
    3,129
    Location:
    never never land...never land here!
    It means the 1-4X25mm scope I have on one of the AR's will not co-witness the sights, front or rear...and the height of the sights are in the center of the scope.

    The front sight looks like it is a ghost! Booooo!
     
  6. raz-0

    raz-0 Member

    Joined:
    Dec 26, 2002
    Messages:
    788
    Location:
    NJ
    The nature of the optics won't permit you to. Your front sight will basically look like you are staring at it from a couple inches away and it will be large and out of focus. How bad that is depends on how big your objective lens is on your scope, and how close it is to your front sight.

    Co witnessing only works with red dot style scopes.
     
  7. Mags

    Mags Member

    Joined:
    Apr 8, 2009
    Messages:
    3,235
    Location:
    Belgium
    Thanks fellas, guess I will just get a QD mount.
     
  8. wnycollector

    wnycollector Member

    Joined:
    Dec 10, 2006
    Messages:
    3,121
    Location:
    Western NY
    I'm glad I read this thread! I had planned on using a DNZ one piece mount to put a Millet 1x4 designated marksman scope on an AR with BUIS that I'm planning on building this spring! It looks like I need to stop over to the Larue website and check out the QD mounts.
     
  9. raz-0

    raz-0 Member

    Joined:
    Dec 26, 2002
    Messages:
    788
    Location:
    NJ
    The american defense recon-x mount works well with that scope as well. I've been using that combo for a while now. My friend is using an spr-e and having some issues getting it far enough forward. I think he just has to readjust the diopter, but it's enough to have him complaining a bit.
     
  10. Maverick223

    Maverick223 Member

    Joined:
    Dec 19, 2008
    Messages:
    11,269
    Location:
    28078
    That is the way to go, the reason it won't work it because of the curvature of the glass...basically because it is a lens rather than a flat piece of glass like a holosight or typical red dot. It is also the reason that an optic gathers more light than the naked eye (with good glass quality, coatings, good grind on the glass).

    :)
     
  11. wnycollector

    wnycollector Member

    Joined:
    Dec 10, 2006
    Messages:
    3,121
    Location:
    Western NY
    Thanks for the tip on the mount. Can I assume that you like the millet DMS?
     
  12. DMK

    DMK Member

    Joined:
    Dec 24, 2002
    Messages:
    8,797
    Location:
    Over the hills and far, far away
    That's interesting. I've used 1x-4x variables on my AR15s and always wondered why the front sight block was slightly magnified at 1x. I just figured that my scopes didn't have a true 1x.
     
  13. Maverick223

    Maverick223 Member

    Joined:
    Dec 19, 2008
    Messages:
    11,269
    Location:
    28078
    That is often times the case as well. I am going out on a limb here, but I don't believe a true 1x is in existence. I have seen good scopes that were advertised as being 1x and they too would not allow you to focus on the front sight.

    FWIW, there is a Bushnell Trophy 1-4x in the buy, sell, trade: accessories if you're interested. Not mine, so you won't hurt my feelings, but figured I'd mention it.

    :)
     
  14. Zerodefect

    Zerodefect Member

    Joined:
    Mar 28, 2009
    Messages:
    4,684
    Location:
    Yakutsk, Sakha Republic
    Night force and Trijicon have true 1X scopes. The Accupoint that I borrowed when aimed at a fence with both eyes open it was a straight line through my field of veiw. At least it was so close to true 1X as far as my rusty eyes could see.

    But the scope is focused on the target. So the front sight is still blurry. Need a QD mount for BUIS use.
     
  15. HorseSoldier

    HorseSoldier Member

    Joined:
    Jul 13, 2006
    Messages:
    5,297
    Location:
    Anchorage, AK
    My Horus Talon is a true x1-4 as well, if I'm not mistaken, but it also won't cowitness back up irons effectively.
     
  16. Maverick223

    Maverick223 Member

    Joined:
    Dec 19, 2008
    Messages:
    11,269
    Location:
    28078
    That may be, but I just can't see how they would get the grind right to still capture more light and go down to a true 1x (however there are plenty that are about 1.05x or 1.1x). Either way, I have never seen one that allowed a focused view of the front sight.

    :)
     
  17. Bily Lovec

    Bily Lovec Member

    Joined:
    Jan 1, 2003
    Messages:
    63
    Location:
    77077
    the odds of using the BUIS are between slim & none.

    DSC_0047.jpg
     
Thread Status:
Not open for further replies.

Share This Page