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AR-15  USGI BACKUP IRON REAR SIGHT

AR-15 USGI BACKUP IRON REAR SIGHT Reviews & Ratings

Current U.S. Army standard-issue backup rear sight for M4 carbines and M16A4 rifles flips up instantly at the touch of your thumb when primary sight fails or tactical situation makes iron sights preferable. Designed in conjunction with Picatinny Arsenal engineering staff and rigorously tested at Fort Benning and Aberdeen Proving Ground for robustness, ease of use, and effective targeting out to 600 meters. Detent-locking lever lets you quickly switch to one of eight range settings: 200, 300, 350, 400, 450, 500, 550, and 600 meters. Adjust windage easily with grooved, A2-style windage knob and position markers on the back of the sight for repeatability of settings. Bright, white, laser etched numbers and markers are clearly visible even in low light. Rugged machined steel construction ensures sight retains zero even under heavy, full-auto fire. Clamps securely to the rearmost slot of MIL-STD 1913 Picatinny or Weaver-style accessory rail on flattop receiver via simple but strong locking bar and bolt. Rounded corners and beveled edges further reduce danger of snagging on other gear when sight post is down. Regulates correctly with A2 front sight on any AR-15-style rifle or carbine; instructions included for adjusting front sight post height to set exact zero. Designed to co-witness with most non-magnifying optical sights. SPECS: Steel, matte black finish.

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Reviews Summary
Customers generally appreciate the AR-15 USGI Backup Iron Rear Sight for its military-grade quality and reliability. Many highlight its ease of use and low profile, making it suitable for various setups. However, some users reported issues with screws and pins, alongside concerns about their cost compared to alternatives.
What Reviewers Are Saying
Product Quality
70%
Reviewers consistently praise the overall quality of the Backup Iron Rear Sight, emphasizing its military standard design and reliability in combat situations. This theme resonates strongly, with many stating it provides confidence when in use.
Performance and Usability
65%
Many reviews highlight the sight's performance as a backup option, detailing experiences with its ease of adjustment and accuracy. Users appreciate its robust usability across various firearm setups, reaffirming its effectiveness for both personal and military use.
Issues with Components
30%
Some customers experienced problems with screws and pivot pins, leading to concerns about durability. While many found performance satisfactory, a notable few reported malfunctions that impacted accuracy, indicating a potential quality control issue.
Cost Consideration
40%
A competing theme involves the cost of the sight, as several users mentioned that while the quality is high, it comes at a price. Some feel that more affordable alternatives may offer similar performance, prompting debates about whether the investment is justified.
Design and Compatibility
50%
Reviewers appreciate the sight's low profile and compatibility with various optics, noting that its design allows for seamless integration with red dot sights and ACOGs. This reflects a general satisfaction with its aesthetic and functional design.
5
matech buis
Very happy with matech buis. Have used on numerous builds. Narrow peep post insures unclutterd field of view. Co-witnesses well with red dot and both eyes open. Typical 5 round groups with floated handguard, a2 front post carbine from bench at 100 yards are 1.5 to 2 in groups with old eyes.
Would you recommend this? Yes, I would recommend to a friend
5
Matech BUIS
For me, this is the best BUIS that I install on all my FSB carbines. Installation is easy with tight lockup, and each has been dead on accurate without any windage adjustment necessary. The only adjustment had been to my FSB for elevation adjustment. For me, this is a great, rear BUIS.
Would you recommend this? Yes, I would recommend to a friend
5
Happy Camper
Very Satisfied Customer. This BUIS Is US Military Standard Issue. This Fact Provides Me With Confidence. Ordering Was User Friendly and Shipping And Delivery Was Very Fast. Thank You From A Very Satisfied Customer
Would you recommend this? Yes, I would recommend to a friend
5
Backup iron
Great product, like as issued for OIF.
5
Real Deal
A gotta have back up sight. Well made and works. Happy with this purchase
5
Military Tested and looks awesome
I have four on clone builds but even so this is my favorite rear back up sight. I love the apperture. Its the perfect size. The range adjustments are accurate and its easy to use and zero. The sight stows and works woth my Aimpoints and ACOGs perfect. People complain about the detente but I've never had one fail. I dont play with it or use it much. The mount could be a little more heavy duty but replacements are available. The commercial marking dosent bother me and the sigjt looks very cool. I have one on backorder right now for an M16A4 clone on a Colt AR15A4. I will never go back to the pilymer Magpul mbus sights. I do recommend buying them new so you dont get a worn out one but like U said Im not worried about the commercial Picatinny marking. This buis is awesome.
5
The authentic GI item
I own four of these, now. Years ago, I wanted to recreate my USAF M-4 as closely as I could (without a tax stamp), and found that this MATECH was my issued rear sight. If you are a stickler for mil-spec or nostalgic about your issued rifle, this is your BUIS! And, it's perfectly serviceable: precisely calibrated at carbine and rifle sight radii for an A2 front tower and M855 ammo, and of course works well enough with other bullet weights and rail mount front sights at varying radii. Installs easily, usually fits underneath lower 1/3 optics, fairly sturdy, snaps open with authority and closes positively. Downside? Cost for performance ratio. You pay for all of that intricate white lettering and precision machined elevation cam, etc. So, you can get a modern polymer sight for 1/4 the price, and a simpler, more rugged premium brand steel sight for 2/3 the price. Plus, you may want to have modern rifle aesthetics with matching front and rear BUIS. But, if you like the milspec look, splurge on this quality item and you aren't giving up any performance, and even gain the ability to BDC your ball rounds if you take time to follow the sight in instructions and match the GI sight radius.
5
A MUST HAVE!
If you owned this product in the past and experienced walking pins and stripping... You unfortunately bought a generic clone. If it's the real deal, you'll notice it's rather expensive. I love this sight. Very solid and locks down tight. Nice low profile in it's stowed positron. It'll never fail on you. This will survive WWIII and beyond. No gimmick or fancy features. Just robust, solid, true performance. My matech came with the picatinny logo and their name Laser etched on the right side by the windage knob.
5
Lowest profile BUIS that i am aware of
This sight folds down to almost nothing. I have had a lot of BUIS come and go. All where and still are very good. This one is just lower profile. This is not the sight i would choose for match rifle shooting. It is also not designed to do that. I was designed to be small, lightweight, low profile and tough. It is all of those things.
5
Inspires Confidence
For those who were brought up with, and used iron sights for half their adult life before moving to optics, this sight really in 2nd to none. It can stand its ground as the primary sight too because once the weapon is properly zeroed, the range marking can be trusted. Just dial up or down to suit. Good solid reliable sight.