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Thread: What's your favorite BU rear sight?

  1. #121
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    Quote Originally Posted by Doc Glockster View Post
    How does the YHM hold the apertures on one setting or the other? Does it use a spring-loaded ball like the PRI (and I think the Troy )?

    This is a deal-breaker for me. There has got to be a more sure way to hold the aperture in place than a rinky-dink spring and ball. That's why I got rid of the PRI.
    Yup, the Troy does too.

    I took a few minutes to check out the PRI and three Troys (2 regular, 1 di-optic). The PRI ball and detent system appeared to be more substantial and worked better than the Troy, but neither get my full confidence.

    The GG&G MAD (I have the one with two versions of each aperture) has always worked for me. It has the added advantage (in my book) that the windage knob is at the base rather than hanging in the air. But, at least one gun writer intimated that he had great confidence in the MAD until it failed him. To his shame, he did not elaborate.

    Here's what I think about the MAD problem. There is a small amount of play in the wheel (side to side) where the apertures are. This does not bother me, although the play has gotten a tiny bit worse over the years. My real concern is that some day some tiny bit of grit is going to get into the housing that contains the wheel, and the wheel will stop turning. Using the rule that Murphy made, it will jam between apertures, and there is no way to easily get at the workings to clear the grit.

    OK. To sum up, here's my list of gripes concerning BUIS I currently own:

    GG&G (standard): Tiny and thin button to release the sight. It does not seem substantial enough to withstand hard use. Same plane is pricey.

    GG&G MAD: See above.

    Troy: Weak ball and detent system holding the aperture in place.

    PRI: Same as with the Troy, but slightly better.

    Brownells (simple flip up): Good basic sight, but the aperture is too small and there is no system to lock the raised sight in place. The detent is pretty strong though. The windage adjustment is at the base (good) and the attachment nut is huge (good/bad, depending).

    Magpul (Gen 1): No real complaints. I like the combo detent and spring system to defend the sight from drops. I don't like the top of the large aperture insert (it's flat). And the sight is plastic (not a fan). Works pretty well though, and it's the only sight I know of (except the MAD) with multiple apertures where you can flip up the sight to either the large or small aperture without further adjustment.

    ETA:

    Literally, in the light of day, I took another comparative look at the PRI and Troy sights' detent systems. Both appear (from the Mark 1 eyeball) to be similar in size. The Mark 1 finger test indicates that the Troy spring behind the ball might be a touch stronger than the PRI spring. What makes the PRI appear to be more solid comes from the deeper channel that provides the detent for the ball (i.e., the ball fits better into the PRI detent than the Troy). It also appears, without taking measurements, that the detent channel on my di-optic is shallower than the standard Troy.

    Getting a really solid lockup might involve a deeper channel, stronger spring, or a more massive system altogether. Of course, all these come with costs. Carving a deeper channel in the aperture assembly would probably not bode well for the longevity of the sight -- you would lose the hard anodizing that protects the channel from wear. Unless you are willing to go through the trouble of pulling the sight apart and finding a stronger spring (which would, of course, create greater wear on the channel through flipping the aperture), I suggest lubing the channel occasionally to cut down on wear to the anodizing. This would help to preserve the status quo.
    Last edited by Amicus; 11-30-11 at 09:21. Reason: Better comparison in the light of day
    'That whole effort was held together by sweat, shame, and a tiny bit of pride.' -- Son of Commander Paisley

  2. #122
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    I have used Troy, MaTech, Magpul and currently LaRue BUIS.

    I definitely like the LaRue BUIS the most so far. I have the same plane version and it is just like the A2 carry handle sight. Just without the extra weight and elevation.
    "Give me Liberty, or give me Death!" - Patrick Henry

  3. #123
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    Since starting this thread I finally pulled the Matech sight out of the packaging and the sight definitely looks Mickey Mouse as far as durability. I think the aperture is too small too.

    The KAC sights are looking better and better aren't they?

  4. #124
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    KAC 300 600 or the Troy

  5. #125
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    Knight's 300M.

  6. #126
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    Anyone have some pics of fixed front and rear BUIS with a normal size aimpoint? Pics through the irons and RDS, I'm curious what this looks like because I don't know anyone in person with such a set up. I'm highly interested in going with fixed sights and an Aimpoint Comp M4 on m next build.

  7. #127
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    I have a Matech on my 6940, it is sturdy and the small aperture is accurate for my normal shooting ranges, 50-100m. The adjustment out to 600m gives me a warm fuzzy, but I would never be taking a long range shot like that on iron sights in a real life scenario. I can see how the long range adjustments are useful in the battlefield because you don't have to worry about missing a few shots. And you can spot yourself in with a partner by walking shots to your target, but in police work you can't afford to miss if you're going for an accurate shot. The Matech does not look durable at all, but I haven't tested that at all. Its just a thin piece of metal sticking in the air. Also the elevation adjustment knob looks easy to hit on accident and put it out to 300/400, but I haven't done that on accident yet.

    I just ordered a Troy ($83 black friday sale), so I hope it holds up. I had no idea there was issues with the apertures getting lose because everyone I know tells me how awesome the Troy is. I only use my irons a few times a year, so hopefully they'll last a decade before I need to replace them!

    I wasn't aware of the KAC sights before I found this thread, but I'll look into those if I decide I want the 600m warm fuzzy back.
    Last edited by Ronin64; 11-30-11 at 12:43.

  8. #128
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    My Troy has a very slight movement when you apply a little pressure to it. I got over being concerned about that. On my strictly irons gun, I use a Larue. On the optics gun, I figure the Troy is back-up anyhow.
    "Men speak of natural rights, but I challenge any one to show where in nature any rights existed or were recognized until there was established for their declaration and protection a duly promulgated body of corresponding laws." --Calvin Coolidge

  9. #129
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    Quote Originally Posted by Ronin64 View Post
    Anyone have some pics of fixed front and rear BUIS with a normal size aimpoint? Pics through the irons and RDS, I'm curious what this looks like because I don't know anyone in person with such a set up. I'm highly interested in going with fixed sights and an Aimpoint Comp M4 on m next build.


    This was taken from my work rifle. LMT rear and Aimpoint M4 with Killflash in a absolute co-witness LaRue mount. My eyes don't focus like the picture projects - the rear sight blurs out entirely when I'm on target with big peep flipped up.
    Second place earns a body bag.

  10. #130
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    Just got me some Diamondheads, I'm really liking them. More so than my Troy DOA or Mbus.

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