Consensus on BUIS / Iron Sights

If you have a real quality optic rugged rds I can see going without. I like to have low profile buis absolute co-witnessed, where I have more budget optics like holosun. Buy once cry once is the way to go and if you have multiple rifles, well find a nice balance, make sure the buis are durable and locking.
 
The folding Troy on my AR works just fine and gets regular use. One lower, various uppers. It gets moved around once in a while.

If your interest in AR type rifles is strictly gun games and recreation, then yeah, why would you want to mess around with back up sights?

On the other hand, if you're doing fighting drills - just in case of course - then why wouldn't your "just in case" scenarios not include the possibility of optical sight failure? What's more likely?

Everybody gets to choose their own drummer and then march to the beat of that drummer. My 60+ year old eyes vastly prefer optical sights these days, but every trip to the range with the AR usually includes some time spent shooting with either the Troy's or a detachable handguard aperture sight. First, because I still enjoy the challenge of shooting at distance with aperture sights - and the reassurance I can still hit stuff way out there with aperture sights. Second, because I started shooting back in the 1960's with aperture sights and then started in the military when C1s and then the original C7s were aperture sights, so it's a skill I want to retain. And third - why not? It's just one more skill at arms to master.
 
I took of my optics for some reason or another early this year. Have really enjoyed getting back to shooting iron sights and the challenge of getting my groups down to a respectable size. I put on a Blitzkrieg Components front post with the chevron. Having a sharp point to focus on took me from 4MOA to 3MOA overnight. I would really like to get under 3MOA with iron sights consistently but that will probably mean having to buy a match grade barrel.:)
 
Have you considered ARMS 40's? They are very easy to put into action, sight in, accurate and very consistent. i.e. point of impact does not change from dropping them down to flipping up. They do a lower 1/3 co-witness with the GG&G mounts (i.e. standard 2" height). I have only tried a few other flip up open sight types such as, Yankee Hill and Magpul....ARMS 40's in my opinion are far superior due to ease of sighting in and quality of materials / construction. They are a couple ounces heavier then the Magpul but similar low profile and about same weight as the Yankee Hill sights. For what its worth I get bored easy and when you have BUIS and a quick release / repeatable optic mount I find it quite interesting & enjoyable releasing the optic, practicing with the BUIS and reapplying the optic. It adds another layer to our sport I suppose. Usually not that far off of POI with the GG&G mounts....generally a click or two (1/2 MOA). However I do see other peoples points as it is mostly window dressing so to speak. I think with out a quick release mount you won't use them unless you have to.
 
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I still have a bunch of Troy BUIS and some ARMS around. Be honest, they are mostly decorating items and I actually took off most of them these days, unless I have a reflex sight setup for co-witnessing of some sort.
 
I have 45 degree transition BUIS backup sights on my AR15 for the purpose of making different type of drills......they are made in China and they are solid and have served me well.

I do not have back up sights on anything else I own.....besides the original and permanent sights already on the rifles.
 
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