User Panel
Posted: 10/14/2004 6:59:24 PM EDT
[Last Edit: strick909]
UPDATED: 8/4/2006
What is BUIS anyway? BUIS, or Back Up Iron Sights, come in many configurations. The purpose of a BUIS sytem is to give the shooter the ability to accurately aim the rifle if the primary optic fails. What types are available? Two types are available, flip up and fixed. It is possible to combine the two systems and use a flip up in the rear and a fixed FSB (front sight base) or vise versa. What is co-witness? A: Co-Witness is the ability of your irons to look through your optic (1x - not magnified) - so they both shoot on the same trajectory. There are two kinds - absolute (both the dot and irons are on the same plan), and offset (where the irons are usually in the lower 1/3 of the optics display). With co-witnessed sights you can verify the zero of the optic by looking through the irons (the dot should sit on top of the front sight). However, normally you look over the irons and just use the optic (trust me, you won't notice the iron sights); should the batteries fail your head comes down a fraction of an inch and you're using the iron sights (looking throught the now-dead optic). (from the Maryland AR15 Shooters FAQ) groups.msn.com/isapi/fetch.dll?action=MyPhotos_GetPubPhoto&PhotoID=nJwAAANwMUuAJ7JC8BIu3u5hfwsqH9Z0x3oIwsknAVfVqkoJ0B820UgDvJdctqwwGbFtqpVZEnbk What makes folding BUIS so good? Some shooters like to use a primary optic (such as an Aimpoint or EOTech) with no visual distractions. The folding BUIS sytems would be ideal for this. Other shooters using magnified optics will require a folding rear sight in order to get proper placement of a scope. Many first responders like a folding front BUIS because it is less likely to get hung on something compared to a fixed FSB. What makes fixed BUIS so good? First, it is less expensive. Most rifles will come with iron sights and adding a primary optic to an existing system would be the cheapest way to get set up. Also, if you ever need your BUIS, there is nothing to "flip". They are already in place. That means that the time to transition to BUIS from a disapearing red dot is zero. If I use a magnified optic, won't the FSB be in the way? Nope. You won't even see it. What distance should I zero my BUIS? 50 yard IBZ Where is the best place to buy my BUIS? Who has the best prices? Please support the dealers who support this site! Check the Industry Forum for a list of dealers and also check the Equipment Exchange for other deals on BUIS and optics from dealers and members of AR15.com!! All of the BUIS below have a hot link to the original manufacturer. These links are for informational purposes. Most of the time, an AR15.com dealer will have a better price. However, there are exceptions. Ameetec, Bushmaster, & Cavarms are all AR15.com supporters, so it's ok to order from them. Talon Arms is my personal dealer of choice... Talon Arms in the Industry Forum What BUIS sytems are available? ARMS 40L 40L SP (same plane aperture) 40A2 (2.0 oz) Ameetec Arms Front Folding Rear Folding Bushmaster BMAS BMAS fixed rear (3.2 oz) BMAS flip up rear (1.5oz) BMAS Flip up front BMAS flip up front rail mount Cavalry Arms Cavarms fixed rear DPMS Fixed rear Mangonel Front Flip Up Sight Mangonel Rear Flip Up Sight Detachable Front Sight GG&G MAD flip up rear A2 flip up Tactical Modular flip up front Flip up front for dovetailed gas blocks Knight's Armament (no link available) Rear Folding 300 Meter Sight 600 Meter Folding Rear Sight (2.25oz) Folding Front Sight for RAS LaRue Tactical Fixed rear sight (QD) (3.0oz) Les Baer Front flip up w/gas block LMT Fixed rear sight Tactical Front Sight Assembly Matech No link Folding rear no photo Midwest Industries Folding Rear PRI Front flip up gas block Rail mounted front sight Samson Mfg. Quick Flip Sights Barrel mounted Quick Flip Sight / Gas Block Rail Mounted Quick Flip Sight Weaver gas block mounted Quick Flip Sight Troy Industries Flip up Rear (1.9oz) Flip up front Rail mount (2.2oz) Wilson Combat Flip-Up Rear Sight Yankee Hill Machine Gas Block Front Flip Sight Forearm Front Flip Sight Solid Front Sight Front Sight Gas Block Front Sight Tower Flip Rear Site Solid Rear Sight |
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"You exist to serve the mission. No one owes you anything." The Warrant's Manifesto
http://www.adoptasniper.org |
Absolutely needs to be a sticky
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BTT for comments anyone?
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"You exist to serve the mission. No one owes you anything." The Warrant's Manifesto
http://www.adoptasniper.org |
This should be tacked. Good info.
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I would really like to see some opinions of people that have used or are using any of these BUIS.
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It's better to be hated for who you are than loved for who you're not
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That's why I posted this. I was hoping that we could start a central BUIS discussion thread instead of reading 50 seperate threads on each individual BUIS. FWIW, I use the ARMS 40A. It's very solid and combat proven. You can find them in the EE all the time for less than $100. I am looking to pick up a new BUIS for a scoped upper. I really like what I am hearing about the ARMS 40L and the Troy folder. Hopefully we will get some reviews soon. |
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"You exist to serve the mission. No one owes you anything." The Warrant's Manifesto
http://www.adoptasniper.org |
norman74,
Thank you very much! I forgot all about the KAC sights. The others I have never seen. |
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"You exist to serve the mission. No one owes you anything." The Warrant's Manifesto
http://www.adoptasniper.org |
This rates a permanent tack.
Dave S BTW, thanx. |
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Some good info in this thread. Hesitate to say to tack since 1. There are a lot of stickys alreadys and 2. People refuse to read them and ask the same ass questions anyway. GJ though.
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DPMS, LMT and Les Baer added
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"You exist to serve the mission. No one owes you anything." The Warrant's Manifesto
http://www.adoptasniper.org |
I think it needs to be tacked. All the other stickies have to do with optics. Starting just 1 for BUIS is beneficial.
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"Those who make peaceful revolution impossible will make violent revolution inevitable."
-John F. Kennedy |
I agree this needs to be tacked to this page.
Too much good info to just pass up. |
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"The price good men pay for indifference to public affairs is to be ruled by evil men." - Plato
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Good info. Now, just add the weights for each, and it will be tack worthy.
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"Common sense is not so common."- Voltaire
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Bump for all the BUIS questions lately
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"You exist to serve the mission. No one owes you anything." The Warrant's Manifesto
http://www.adoptasniper.org |
Great thread!!!!!!
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CAR-10 AR10 Carbine Buffers: www.ar15.com/forums/topic.html?b=7&f=120&t=229073
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+1 for Tagged.
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Thanks for the info Good Job. Answers a pile of questions I had about sight options. Can they put this in the build it yourself section for further reference?
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tag
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MOLON LABE
"The millions of people, armed in the holy cause of liberty, and in such a country as that which we possess, are invincible by any force which our enemy can send against us." - Patrick Henry 1775 |
Great Job !!! - BTW I think you should add the Cav-Arms A1 style fixed rear sight.
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Shoot Straight
and visit www.MD-AR15.com |
If someone knows the weights of each, I will add them. And does anyone have a link to Knight's? I did not list MSRP because all of the links are hot and you can get that info from the manufacturer anyway. But, if you guys want it, I will list it. Is there anything else I am missing? (BTW, I did not list the A1 hot-linked because it is not yet a regular production sight.) Knights (via Impact Guns), Cavarms, and Wilson Combat added to the first post. |
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"You exist to serve the mission. No one owes you anything." The Warrant's Manifesto
http://www.adoptasniper.org |
Great info! Someone tack this post already!!!
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I'll tell you what I'll share the info I have if you get the weights on the others: From the 'Chart of AR-15 Part and Assembly Weights' from The Maryland AR-15 Shooters Site: (weight is in US ounces). Troy Front Flip Up Sight 2.2 Troy Flip Up Rear BUIS 1.9 ARMS #40 BUIS 2.0 LaRue BUIS 3.0 KAC 600M BUIS 2.25 Armalite "Chopped Carry Handle" sight 4.9 Detachable Carry Handle (A2 sights) 9.6 |
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Shoot Straight
and visit www.MD-AR15.com |
Tag..good info here
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Thanks forrest, I will post more weights as I get them.
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"You exist to serve the mission. No one owes you anything." The Warrant's Manifesto
http://www.adoptasniper.org |
very cool, the only buis I don't see on the list that I know of is the Matech buis being used by the army some, I can not find the pic at the moment thought, the thread that they were discussed in is over 3 months old,
there were nice pics at this thread |
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Nemo enim fere saltat sobrius, nisi forte insanit.
Almost nobody dances sober, unless he happens to be insane |
That link is dead. |
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"You exist to serve the mission. No one owes you anything." The Warrant's Manifesto
http://www.adoptasniper.org |
To quote the Guiness commercial,
Brilliant! Good work, Strick. |
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In addition to the weights, I think it would be great if everyone that uses the various sights could post folded heights. Might save folks trouble, time, and money when selecting a sight to fit under an optic. Great post, by the way!
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WWW.ADCOFIREARMS.COM
ARMS.DD.GG&G.LMT.Magpul.PRi.TD.TroyInd.VLTOR |
This is awesome! I will add this to the first page/first post when you update. That is, if it is ok with you. (stuff like this is why I love ADCO ) |
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"You exist to serve the mission. No one owes you anything." The Warrant's Manifesto
http://www.adoptasniper.org |
No problem.
Pics of the Matech BUIS: www.appliedinc.com/matechbuis.jpg www.appliedinc.com/matechbuis1.jpg *added to page 1. |
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WWW.ADCOFIREARMS.COM
ARMS.DD.GG&G.LMT.Magpul.PRi.TD.TroyInd.VLTOR |
ADCO ROCKS! |
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"Common sense is not so common."- Voltaire
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TAG
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"Every citizen must be ready to participate in the defense of his country. For that reason, I believe the Second Amendment will always be important." ---- Senator John F. Kennedy, April 1960
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This should be tacked, don't you all think?
IO1 |
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Updated and tack worthy I hope.
TheRicker, I just hot linked the gif. As you update, it should be seen in my first post unless you move it. PM me if you do and I will fix the link. Great job BTW! |
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"You exist to serve the mission. No one owes you anything." The Warrant's Manifesto
http://www.adoptasniper.org |
tag
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Four years is a long time.
Supreme Court Justices are forever. Vote to keep your guns. |
TAG
And you know, if a sticky doesn't happen, we can always make it into a web page and update it as needed. strick909 - Nice Job! |
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Join us at: www.co-ar15.com
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Man, I sure wish this was a sticky before I spent valuable reading other's useless postings on BUIS 's . Many of the other postings were nothing more than Ford vs. Chev type banter. I just want the facts...man without having to read everybody's sales pitch, catalog description and biased testimonials. This is by far the most definitive info with pictures on the subject. This post is definitely a time saver and could lead to reducing those same old questions being asked over and over again. Of course, there are those who no matter what just want to ask questions with out the effort to research.
Great job strick909 !! |
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I plan on getting a Rock River CAR A4 one of these days with the gas block instead of the standard front sight. So as a general rule do most of you guys pair up the front & rear flip-up BUIS by manufacturer - for example do you stay with both YHM, Troy or GGG for front/back or does it make no difference? Is there an advantage to stay with one manufacturer for both or not?
Also, since ARMS does not make a front flip-up, which front flip-up BUIS would match up with a ARMS 40L on a rifle like the CAR A4? Thanks, Mike. |
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I have a 40% off coupon for Wilson Combat. Does anyone have any experience with the Wilson BUIS?
Thanks for any info. |
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Mike 48,
You can mix and match BUIS all you want. Make sure that the front flip you buy is made to mount on a gas block and not the front rail. The GG&G is very well made. The BMAS and YHM are both made by YHM and a good choice as well. Both should work with the ARMS with no problems. The Troy Ind. front is made to mount on the FF rail not the gas block. BillD, I have never seen the Wilson in person, but for 40% off, it seems worth the risk to me. |
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"You exist to serve the mission. No one owes you anything." The Warrant's Manifesto
http://www.adoptasniper.org |
btt
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Join us at: www.co-ar15.com
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All mil-spec rear sights must be at a certain ht. Front sights from after market makers should be mostly OK, but the rear sight is the governing factor if it is mil-spec. Mil-spec means that the goverment have bought them to work with the std. ht. of the issue barrel mounted weapons that Colt and FN make.
Jack |
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uh... please tack this forum
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apologize for my slack... I will tack this. But there is A LOT of tacks... I am most likely going to have to reorganize the tacks and consolidate them in some way. I have avoided doing this for more than a year, but there's just too many now. When I do it, this one will be there for sure. I agree with the guy that quoted the Guniess commercial... BRILLIANT! hahaha!
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FDCC - 1*
FL Defensive Carbine Club; www.fdcc.us/ Go chrome or go home! |
tag.
Nicely done. |
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"Whoever battles monsters should take care not to become a monster too,
for if you stare long enough into the Abyss, the Abyss stares also into you." --Friedrich Nietzsche Fast is fine, but accuracy is everything. --Wyatt Earp |
Tag. Wow, great info here. Thanks alot for taking the time to compile all this. Makes my gear whoring easier.
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In the interest of correctness... the flip front listed as "Les Baer" is actually built by Young Manufacturing.
www.brownells.com/aspx/NS/store/ProductDetail.aspx?p=19614&title=AR-15%2fM16+FRONT+SIGHT+GAS+BLOCK |
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