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  • MaTech Mil-Spec Back-up Iron Sight (B.U.I.S)
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MaTech Mil-Spec Back-up Iron Sight (B.U.I.S)

by MaTech
| 14 answered questions

List Price: $149.99
Price: $79.95 & FREE Shipping
You Save: $70.04 (47%)
Only 9 left in stock.
Ships from and sold by Money Saved.
  • Windage: 1/2 MOA
  • Elevation: 0-600m
  • Compatible with Picatinny style rail mounts and tested to retain zero under extensive firing conditions
  • One-touch flip up aperture for instant utilization
  • MaTech will not support BUISs purchased through non-authorized distributors on Amazon or elsewhere.
18 new from $63.00 2 used from $90.00
$79.95 & FREE Shipping Only 9 left in stock. Ships from and sold by Money Saved.

Frequently Bought Together

MaTech Mil-Spec Back-up Iron Sight (B.U.I.S) + UTG Model 4/15 4 Prong A2 Front Sight Tool
Price for both: $89.40

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Product Description

The Picatinny Backup Iron Sight, manufactured by MaTech is the standard issue BUIS for all new and fielded U.S. Military M4 carbines and M16 flat top rifles. Rigorously tested at Fort Benning and Aberdeen Proving Grounds, our product has the strength, durability, and accuracy to meet your sighting requirements. NSN 1005-01-484-8000

Product Details

  • Item Weight: 0.2 ounces
  • Shipping Weight: 7 ounces (View shipping rates and policies)
  • ASIN: B002E6SXN4
  • Item model number: Back Up Iron Sight
  • Average Customer Review: 4.7 out of 5 stars  See all reviews (129 customer reviews)
  • Amazon Best Sellers Rank: #17,127 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
  • Product Warranty: For warranty information about this product, please click here

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Customer Questions & Answers

Customer Reviews

Well made sight and quality metal.
erik
I used this while I was in the military and I was probably one of the best sights I've ever used on a AR or any other rifle I've ever fired.
W. casselman
Great iron sight, in every aspect....this is the same rear iron sight that is attached to the colt 6920 socom II limited edition model.
8921

Most Helpful Customer Reviews

48 of 52 people found the following review helpful By Rod on May 21, 2010
Verified Purchase
I first used this sight when I instructed active duty soldiers in rifle marksmanship as part of their pre-deployment work up. Any of the men using red dots had to pull them off after 300 yards and go to their Back Up Iron Sights (BUIS). Once zeroed at 25 meters (white dash between 300 and 400) this rear sight will work for a rifleman out to 600 yards. When the sight is flipped down it's well protected and has a very low profile. The only change I've made is to drill and tap the peep to take inserts, allowing for smaller apertures. I can get any BUIS I want and this is the only one you'll find on my rifles.
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31 of 34 people found the following review helpful By Brian Miller on February 22, 2013
Verified Purchase
This sight is exactly the same one that the US Army uses on their M4/M16 A4 models with the Aimpoint sights. Just like the one i had 2 different times while deployed to Iraq. The sight looks great functions properly and was shipped fast (received in 3 days). After installing on my Colt LE 6920 it was easy to zero. I recommend this as a great back up sight for anyone using optics on their AR style rifle. However it does not have a larger peep hole for night shooting it functions perfectly for its intended purpose of a back up sight.

If anyone wants to know how to zero the sights on an AR to 300 meters on a 25 meter target with this sight and a standard fixed front sight keep reading.

I would recommend you mount the sight as far back as possible on the rifle as to not obstruct the use of the charging handle (since the peep hole is so small you will be able to see more through it). First you need to perform what we call in the Army “Battle sight Zero.” Use the windage knob to move the center mark of the sight left or right to center of the hash mark of the base and placing the range lever on the line below the 300 meter mark on the sight, once zeroed use the range value that is appropriate to your target range. Then use an unfired round or a front sight adjustment tool or a punch to adjust your front sight post so the base of the post is flush with the back of the front sight post base. I then recommend zeroing it at 25 meters using a M4 zero target you can download save and print from [...] .
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10 of 11 people found the following review helpful By Amazon Customer on December 5, 2011
Being a Soldier in the Army means I have to not only be able to shoot but shoot well, unfortunatly I have yet to be in a unit that goes to the range more than twice a year. I ordered this sight for two reasons, 1. My POW didn't come with a sight and 2. This is the backup sight the army issues us.

I took my weapon (an M4) out to the range using this sight and found it to be dead on accurate (once zeroed ofcourse) the sight is easy to use and since it's a flip up sight I can push it down and out of the way when using a Red Dot Sight or when not in use. I have no complaints about this product and for me that is saying something.
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7 of 8 people found the following review helpful By omar alvarado on April 25, 2011
Verified Purchase
this sights are excellent for the money, knobs are crisp. just make shure you get the appropriate front sight or you will have to be zeroed at 300y like in my case. it should work fine with fixed front sights.
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3 of 3 people found the following review helpful By enduser on November 17, 2010
Thanks for the BUIS. It is quality. The description matched the product. I already have it mounted. It was shipped out immediately. Thanks!
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3 of 3 people found the following review helpful By J. Anderson on April 22, 2013
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Brand new in package and exact same as my M4 at the armory...why not go with what you know that works?
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2 of 2 people found the following review helpful By Phillip B. Jelks on March 20, 2013
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Just like the one used by the military. Easy to use, sight in, and dead on accuracy. Would buy again.
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4 of 5 people found the following review helpful By ESTEBAN on July 31, 2012
Verified Purchase
I chose this over the MAGPUL MBUS for two reasons. 1) While MAGPUL products have never failed me, I am not comfortable with placing my ability to engage a target in the hands of a polymer tool and 2) The MATECH was issued to me in Afghanistan and did not fail me once. I appreciate that you can co-witness with the CCO and EOTECH sights as well. Prompt delivery by the seller and perfect item make for a happy me.
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