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Thread: Daniel Defense A1.5 same plane?

  1. #21
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    Quote Originally Posted by justin_247 View Post
    Mine definitely appears to be same-plane. The holes in the two apertures are different sizes, but the actual external diameter of the apertures are identical and appear to have been drilled in the same spot for each.
    That evidence leads to the conclusion that the sight is NOT same plane (as was verified later). The reason there is a shift is the threads that the sight aperature rotates on. You are essentially moving the sight slightly to the side as it rotates on the threads. If the large aperature is a bit shifted to the side opposite the rotation the sight would be same plane.

    Rick

  2. #22
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    Quote Originally Posted by rob_s View Post
    Anyone confirm this one way or another by, you know, contacting the manufacturer?

    I have always been under the impression that they were not same-plane but the one I use has a Howe leaf in it now so I can't check mine.

    FWIW, I ordered a Troy fixed rear for some iron sight training I'll be doing precisely because I did not believe the DD was same-plane. I started this thread precisely to help me make my decision.
    I'm under the impression that the aperture is a standard A2 aperture which is not on the same plane. Unfortunately when you purchase these sights they don't come with zeroing instructions. Its my opinion that for most situations, most people would prefer a same plane aperture. Using the large aperture for low light/close engagements and using the small aperture for more precise shots.
    Last edited by Cagemonkey; 04-06-11 at 17:09.

  3. #23
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    On the M-16 the big aperature was for closer targets, and the small for farther targets, like 300 meters. I don't remember the switchover point. The difference between the two is going to depend on your particular setup, like how far apart the front and rear sights are. They are probably closer together than on an M-16 so there is no one answer for what range to switch over from big to small if using a non-same plane aperature rear sight.

    Now, does anyone know if the DD A1.5 fixed rear is compatible with an "F" marked fixed FSB? Just took my new BCM middy out for the first time and it is great, but the flip up rear sight I put on it is too short, Adjusted the front sight all the way down (for higher point of impact) and it shoots way low.

  4. #24
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    When I had my DD A1.5 rear sight with a DD front I had to adjust the front sight WAY further down that I would consider acceptable. I have since ditched the front all together and moved the rear to a F marked FSB rifle and the FSP position is much more acceptable.

    The sights are rock solid and I love the Paul Howe rear aperature I put in but the tiny nub of a front sight post I found unacceptable and I have since switched to KAC micro front set ups.

    Rick

  5. #25
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    thanks Boone, sounds like it worked well with the F marked so I'll try it.

  6. #26
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    Quote Originally Posted by BooneGA View Post
    When I had my DD A1.5 rear sight with a DD front I had to adjust the front sight WAY further down that I would consider acceptable. I have since ditched the front all together and moved the rear to a F marked FSB rifle and the FSP position is much more acceptable.
    That's strange. I've never tried the DD rear sight. But the Front sight is right at mechanical zero when matched with my BCM carry handle.
    "You people have too much time on your hands." - scottryan

  7. #27
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    I just sighted in my 18" middy with an F marked FSB today and DD rear A1.5 sight and had to lower the front post by 2 turns to zero it at 25yrds, I've got a hunch this thing may have been designed with a 50 yard zero in mind, I'll test that next week when I get to an outdoor range.

  8. #28
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    Looking at the zeroing instructions for the DD M4 Carbine it seems the A1.5 is not same plain since you have to have the small aperture up for zeroing properly the way they describe, though I think it has been established that it is not same plain all ready. Also with the small aperture up during zero with F marked front post on a carbine length gas system it is the 25-300 yard zero they list with the large aperture for 0-200 yards and small aperture for 300-600 yards.

    I am guessing if you have to move the front post down then the F marked post is on a mid length gas system and not Carbine length and the A1.5 is set up for carbine length originally.

  9. #29
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    Another nice feature of the Troy rear folding Battlesight is that both apertures are on the same plane, so you can zero with either one.
    Read 4. on instructions below/attached.
    http://troyind.com/manuals/RearSight_Manual.pdf

  10. #30
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    Quote Originally Posted by Drummer View Post
    Both aperture holes are on the same plane, meaning there's no shift in point of impact when you switch between sizes.

    I installed one of the XS sights same plane apertures on my DD 1.5 and it works fine.

    me2 works great
    i started this life with nothing.....kept most of it.

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