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Posted: 2/10/2009 7:43:25 PM EDT
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I just recently purchased my first AR15 and I am looking for a BUIS to mount under my ACOG. I have narrowed my search down to three models:
ARMS 40L Matech 600 Meter BUIS GG&G MAD I am looking for opinions of these three sites, as all are great sites with their own unique characteristics and features. Any info is greatly appreciated. Thanks in Advance, Brandon |
| I use the ARMS40L and its been just fine. There is some difference in folded height between the options available, so depending on whether the BUIS has to sit under another optic, one might be preferred over another. I think the ARMS is one of the shorter options. Other than that, I'm guessing that any of the first tier options would be satisfactory. |
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These are new, but are significantly shorter (when folded) than the A.R.M.S. #40-L.
Yankee Hill Machine 
I have the A.R.M.S. 40-L and it has worked just fine for years. I believe the GG&G MAD will give you a wear spot on top of the rail. It looks like it hits when folded. |
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Id look at the Troy and MI low profile sights if I were you.
The MAD blocks lots of FOV, the Maetech is fine if it holds up, but I have seen some that did not. The 40L is fine but the shorter lever is a bit harder to find and flip quickly compared to tte regular 40 and it defaults to small aperature which I dont prefer. |
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Here's my standard post on choosing a flip-up BUIS:
A few things to consider when choosing rear flip-up BUIS, depending on if it's going to be a range gun or a SHTF gun: - Will it be used for precision or long-range shooting? A small aperture is helpful for this. If the use is both close-up and long-range, a dual-aperture sight is useful. - If it's multi-aperture, which one is deployed when it flips? Some flip with the large aperture deployed, others with the small. If you're not in a hurry, this won't matter, but some people care. - If multi-aperture, do the apertures deploy in the same plane? Some deploy with an elevation shift to account for the range differences, others use the same zero for both apertures. - Do you want the windage knob easy to adjust or shielded to prevent accidental adjustments? ARMS are exposed and easy, Troy is shielded. - Does it have elevation adjustments? Some do (like the Wilson Combat), most don't. - How easy is it to deploy or adjust if your hands are muddy or gloved? - Does it latch in the up position, the down position, or both? - How protected is it from damage, both down and deployed? The Matech is one that sticks up with little protection and can easily be tweaked or broken by rough handling when deployed. - How robust is the detent mechanism? The Matech will wear over time and become easier to deploy (and eventually won't lock). For many, this doesn't matter, as their BUIS aren't used often. - How many slots does it cover? This is important if you need to conserve rail space. Figure out which of these are important to you and what capabilities you want, and it will narrow down the choices quite a lot. |
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I've got two Troys, one for my home defense carbine and one for my general purpose heavy duty SHTF carbine.
I like the Troy's shrouded windage knob so it won't get accidentally moved, it locks up in the up position, it have a relese button to lower it, large aperture is visible first when first deployed, low enough when folded to fit most optics, heavy duty robust construction compared to other BUIS, excellent quality workmanship in my opinion. My other folding BUIS is a KAC 300m, I use it if I need the lowest folded height to fit under a large high magnification scope. If you prefer something similar to the Troy but easier to change the windage adjustment, the PRI windage knob protrudes out more but not as much as the A2 knobs, it has a similar design as the Troy. http://www.pri-mounts.com/ |
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