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Thread: So For An RDS Handgun, Wouldn't You Actually Want It Forward Of The Ejection Port?

  1. #11
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    Quote Originally Posted by georgeib View Post
    In one sense, I think the answer to your question is a qualified yes. However, there are other practical considerations that necessitate the current location of pistol RDS. Specifically the amount of available material on a slide, and height over bore for BUIS. As it is, placing the RDS behind the ejection port doesn't really have a deleterious effect on ejection in the vast majority of cases, so there is no practical reason to try and tackle the issues that would present themselves in trying to move the sight forward.

    EDIT: Looks like I need to read more thoroughly before responding. As @Renegade04 responded below, yes the RDS does normally sit between the irons. For some reason, when I first read your post, I was thinking that you were suggesting mounting the RDS forward of the ejection port. Unless I read it as you were editing it, or something?
    You were actually correct, I was suggesting that forward of the ejection port would be a more ideal location.
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  2. #12
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    DefaultMP3 beat me to it.

    Big NO-GO on that.

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    Quote Originally Posted by SteyrAUG View Post
    You were actually correct, I was suggesting that forward of the ejection port would be a more ideal location.
    It would sit too high. You cant get it lower because of the barrel. If youre doing that, make it non-reciprocating like the uspsa open guns

  4. #14
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    I've been shooting pistol mounted RDS for a few years now on a few different guns. I can't imagine how moving the dot that far forward would be better in any way. In fact, I think it would make it worse, as the farther from your wrist, the more pronounced movements would be, possibly making it more difficult to pick up the dot.
    Last edited by SteveL; 05-20-23 at 17:13.
    Steve

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    Quote Originally Posted by Defaultmp3 View Post
    Why would a more forward position give a shooter faster acquisition? The opposite is true for rifles; the closer the optic is to your eye, the bigger FOV you have through the optic, and so the sooner you will see the reticle.

    The argument for rears in front of the RDS on handguns is that you get a slightly less clutter view through the optic, along with the irons possibly providing slight protection for the front lens. Some slide milling for certain slide/optic combos also dictates this arrangement, such as trying to direct mill an ACRO for a non-MOS Glock, due to the factory rear sight dovetail being too far forward to fit an ACRO between the dovetail and the ejection port.
    It's not the same 1:1 comparison, but I noted on my TP9 that running a RDS a bit more center, in this case a open lens type C-More, worked better for me than all the way to the rear. Was wondering if the same wouldn't be true of something like a Glock.
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  6. #16
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    Quote Originally Posted by SteveL View Post
    I've been shooting pistol mounted RDS for a few years now on a few different guns. I can't imagine how moving the dot that far forward would be better in any way. In fact, I think it would make it worse, as the farther from your wrist, the more pronounced movements would be, possibly making it more difficult to pick up the dot.
    So for years with 1911s we were taught to "front sight" everything. How would a center location RDS be any more difficult to pick up than a front blade sight?

    Not arguing with anyone, just thinking out loud as a though experiment. Also full disclosure, I have only shot a handful of RDS sight handguns a few times. Obviously changes presentation a bit and it was slightly more problematic than I imagined it would be.
    It's hard to be a ACLU hating, philosophically Libertarian, socially liberal, fiscally conservative, scientifically grounded, agnostic, porn admiring gun owner who believes in self determination.

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  7. #17
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    Quote Originally Posted by SteyrAUG View Post
    It's not the same 1:1 comparison, but I noted on my TP9 that running a RDS a bit more center, in this case a open lens type C-More, worked better for me than all the way to the rear. Was wondering if the same wouldn't be true of something like a Glock.
    Worked better in what way? The sliding scale of how close/far the RDS is to your eye is a balancing act; the closer the optic is to your eye, the easier time you have to pick up the dot and maintain that sight picture, but the sight physically obscures the picture downrange.

    Quote Originally Posted by SteyrAUG View Post
    So for years with 1911s we were taught to "front sight" everything. How would a center location RDS be any more difficult to pick up than a front blade sight?
    Because the front sight blade is visible the moment it physically enters your field of view. The dot is not visible for the majority of the time during the draw until you are able line up that very small FOV in which the dot is visible through the optic. The closer the optic is to your eye, the larger the FOV through the optic, the faster you can pick up on the dot and start aiming with it. On the flip side, there is no apparent advantage to moving the optic up front, given that the optics and handgun itself are small enough that the issues with peripheral vision isn't noticeable. Throw in the engineering challenges with dealing with the barrel up front, along with holster issues, and there's no reason to mount it up front with most modern handgun designs where you're having the optic sit on a reciprocating slide.
    Last edited by Defaultmp3; 05-20-23 at 17:51.
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  8. #18
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    Quote Originally Posted by Defaultmp3 View Post
    Worked better in what way?
    So I guess I have to figure that out and get back to you.
    It's hard to be a ACLU hating, philosophically Libertarian, socially liberal, fiscally conservative, scientifically grounded, agnostic, porn admiring gun owner who believes in self determination.

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  9. #19
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    If someone figures out how to merge the rough layout of a Leupold Delta Point Micro and advancements(even amaller) on the Holosun SCS electronics and power then it should be doable without too freaky of a holster sight channel. I wouldn't be surprised if some pistol and dot manufacturers working together could pull it off now.

  10. #20
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    Quote Originally Posted by jsbhike View Post
    If someone figures out how to merge the rough layout of a Leupold Delta Point Micro and advancements(even amaller) on the Holosun SCS electronics and power then it should be doable without too freaky of a holster sight channel. I wouldn't be surprised if some pistol and dot manufacturers working together could pull it off now.
    But then what would even be the point of it? The DPM's tiny window only made smaller by pushing it further forward, to... do what?
    Plus ça change, plus c'est la même chose.

    老僧三十年前未參禪時、見山是山、見水是水、及至後夾親見知識、有箇入處、見山不是山、見水不是水、而今得箇體歇處、依然見山秪是山、見水秪是水。

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