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Thread: What's your favorite BU rear sight?

  1. #211
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    Quote Originally Posted by WS6 View Post
    I have never observed this and do not understand. If you are looking through the irons, and you have a "parallax free" RDS, and both are CORRECTLY zeroed, the dot WILL be bisected by the tip of the FSP.
    In theory, but my rifle is zeroed and so is my RDS, and I have personally observed back up rear sights that do not allow you to put the dot on the fron post while looking through the peep.

    I'll concede that it may be the way I get my cheekweld and not in the actual sight itself, but I mention it because it could be important to some people.

  2. #212
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    Quote Originally Posted by Doc Glockster View Post
    In theory, but my rifle is zeroed and so is my RDS, and I have personally observed back up rear sights that do not allow you to put the dot on the fron post while looking through the peep.

    I'll concede that it may be the way I get my cheekweld and not in the actual sight itself, but I mention it because it could be important to some people.
    Are you trying this "across the room", or at 50+ yards? The slight parallax inherent to all optics at close range will cause this, perhaps, depending on your cheek-weld.

    Otherwise, it seems quite impossible to me that your BUIS is zeroed, and looking through it correctly, you do NOT also see your correctly zeroed RDS. Either parallax is getting you at across-the-room distances, or something isn't zeroed.

  3. #213
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    Quote Originally Posted by Doc Glockster View Post
    I'll concede that it may be the way I get my cheekweld and not in the actual sight itself, but I mention it because it could be important to some people.
    This is what is happening. It's the only thing that physically "can" happen to allow what you're describing. However, your contention that a certain make of sight is better for co-witnessing is hogwash. You just somehow maintained a more consistent cheekweld when using the LMT sight.
    Semper Paratus Certified AR15 Armorer

  4. #214
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    Quote Originally Posted by ASH556 View Post
    This is what is happening. It's the only thing that physically "can" happen to allow what you're describing. However, your contention that a certain make of sight is better for co-witnessing is hogwash. You just somehow maintained a more consistent cheekweld when using the LMT sight.
    All I know is that with some brands of fixed back up sights like the DD 1.5 I cannot get the dot to sit on top of the front sight post in a cowitness no matter what I do.

  5. #215
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    Quote Originally Posted by Doc Glockster View Post
    All I know is that with some brands of fixed back up sights like the DD 1.5 I cannot get the dot to sit on top of the front sight post in a cowitness no matter what I do.
    Perhaps this is due to the DD A1.5 not having elevation adjustment, whereas the LMT does.

    Hopefully you're not dialing elevation on your rear sight to get the dot to sit on top of your front post, unless you simply don't care about the distance calibration of the elevation drum on your LMT rear sight.

    What I mean by this is that if your red dot is zero'd at 200 yards, and you have to crank the LMT rear sight to 800 yards to get the dot to sit on your front sight post, you're doing it wrong. You should be setting the LMT rear sight to 200 yards, then adjusting the front sight post until the red dot is co-witnessed properly.

  6. #216
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    I'm not messing with any elevation.

  7. #217
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    Quote Originally Posted by Doc Glockster View Post
    I'm not messing with any elevation.
    Well, interestingly enough, I have owned and used the LMT rear sight, along with magpul gen 1 and 2, Troy, and KAC 200-600. All of them had no trouble co-witnessing with my Aimpoint H1 in an ADM mount.

    If you zero your red dot and your irons separately, perhaps you simply have a completely different sight picture between the two when using non-LMT rear sights, and when you try to co-witness, they don't match up.

  8. #218
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    What's your favorite BU rear sight?

    Noted durability issues aside from the mounting bolt, I particularly like the MaTechs. Maybe it's my .mil experience with them, but they work and they're what I know. Plus, I've been told by many a supply Sgt to "make the disappear".

  9. #219
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    Troy Di-optic folding

    My eyes seem to like the Troy DOA (Di-Optic Aperature,) folding sights. Pricey but I feel they are the hands down best for my old eyes.

  10. #220
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    Quote Originally Posted by Fasstasheck View Post
    Noted durability issues aside from the mounting bolt, I particularly like the MaTechs. Maybe it's my .mil experience with them, but they work and they're what I know. Plus, I've been told by many a supply Sgt to "make the disappear".
    I need to meet your supply sgt. Our is stingy as ****. We don't even get shit we need sometimes.

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