I guess this is kind of an old thread, but anyway. I carried an M4 for 4 years with the Matech BUIS on it. I never had the swinging aperture fail to lock down, as I've sometimes heard, (the detent, or latch failing to catch), and I personally never had the "distance" knob altered by any day to day operations, i.e getting in and out of squad cars, humvees, weapon racks, stake bed trucks, or on any gear I've ever worn. As a matter of fact, it always seemed a little too difficult to alter anyway, so it's strange to think that could happen, but Murphy is always around. I don't at all refute the claim, and as I understand it, there are atleast 2 "generations" of this sight, so that may have something to do with it, but I personally have never had any problems. Great sight in my opinion, but it's just that, my opinion. Are there better sights? Probably, albeit arguably. But they are cheap and easy to find, so I'd called it a good deal at the least. Just my 2 cents.
on a side note, I was always taught, from day one, that unless you are using an optic, keep the sight up to prolong the life of the "catch", but I can see where snagging issues might arise with this method, just another two pennies.
Last edited by CAInstructorTx; 01-30-10 at 16:12.
IF YOU DON'T STAND BEHIND OUR TROOPS, MAYBE YOU SHOULD STAND IN FRONT OF THEM.
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To Err Is Human, But To Persist Is Diabolical
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