AR-15 GAS BLOCK FRONT SIGHT Reviews & Ratings

Multi-purpose front sight works as a fully functional gas block, plus delivers lifesaving backup when primary optics fail or become hindered by low light or poor weather conditions. Machined, steel body features a spring-loaded pushbutton that locks sight in the deployed position. When not in use, simply depress the button and fold down for an unobstructed view through your optics. Protective ears guard the sight post from blows incurred during duty. Split, barrel clamp design allows easy mounting to standard contour barrels without removal of flash hiders or muzzle brakes. Hex cap screws pull clamping halves tight to barrel for complete sight immobilization when properly tightened. Durable, mil-spec, phosphate finish resists rust and corrosion. YHM-9394 includes bayonet lug and pivoting sling swivel that accepts tactical slings up to 1¼" wide. Rubber coating prevents swivel from rattling and giving away your position while on patrol. YHM-9835A has Picatinny-style under-rail that accepts lights, lasers, and other forward-mounted accessories. No sling swivel.

SPECS: Steel, phosphate-coated finish, dark gray. 1-7?8" (4.8cm) long, 1-3?16" (3cm) wide. Sight Post – 2ј” (5.7cm) high when raised. Fits standard, .750” diameter barrels. YHM-9394 – 6 oz. (170g) weight. YHM-9835A – 7.7 oz. (219 g) weight.

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Reviews Summary

Customers rave about the YHM Front Sight/Gas Block for its sturdy build and ease of installation. Most users report it functions perfectly without gas leaks and holds zero, making it a reliable upgrade for AR-15s. However, a few mentioned concerns about precise alignment during installation and the need for better locking mechanisms. Overall, great value for the price.

What Reviewers Are Saying

Product Quality

80%

Reviewers frequently highlight the quality and durability of the YHM front sight/gas block, noting its solid construction that withstands heavy use and maintains functionality over time. Many express satisfaction with its performance, claiming no gas leaks or malfunctions, which enhances their shooting experience.

Ease of Installation

70%

Several reviews mention the straightforward installation process, emphasizing that even users with limited gunsmithing skills can effectively install the sight. However, a few note that alignment requires patience and careful attention, as the sight requires proper lining up for optimal performance.

Functionality and Performance

75%

Users praise the functionality of the sight, with many reporting that it holds zero well and operates as intended. The flip-up feature is appreciated, allowing for quick deployment. Some highlight the sight's flexibility as it can work with various rifles and setups, enriching the overall shooting experience.

Value for Money

65%

The general consensus among reviewers is that the YHM front sight/gas block offers excellent value for its price. Many appreciate its dual functionality as both a gas block and flip-up sight, providing cost-effectiveness while meeting quality expectations.

Design and Aesthetics

60%

Many customers comment on the attractive design of the front sight/gas block, noting it integrates well with various setups. Users appreciate that it looks good while also being functional, enhancing the overall appearance of their rifles.

Minor Drawbacks

40%

Some reviews mention minor issues, such as the locking mechanism being a bit stiff, and the need for precise alignment during installation. A couple of users suggested that the design could benefit from additional features like better indexing for alignment stability.

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Decent option

Installed this on a customers rifle and was pleased with it. I prefer a block with set screws as opposed to a clamp on style but have not had any problems. Would also be nice if the sight was spring loaded. However, this sight was very solid. The rifle functions just fine and i havent had any issues with the block moving out of alignment

great, but could be better

great fit on my s&w m&p-15x. 50 rounds later it ran like a top. only reason it dosent get 5 stars is the fact that its hard to get it exactly level so its not canted because it has only the 2 straps w/ skrews. they should have out ridges on the bottom of the barrel straps to fit into the the cutouts for the front sight pins in the barrel. so it would auto level itself. something you think a company like yhm could figure out, but whatever. also the push button and locking mechanism seems like it could have been made better. but it works ok

Good gas block

This is a solid block that installs fairly easily and works well. The sight is sturdy and locks positively in the "up" position. I've put two of these on uppers. I would have given it 5 stars if Yankee Hill included some sort of metal shim that properly spaces the block for installation without a handguard cap.

Great Product, better than expected.

I ordered this sight to replace a broken one on an older barrel I had with a permanently attached flashhider. I was reluctant to use or try a front sight/ gas block that was a clamp on design but I must admit once installed it fits and performs excellent. It has given a custom look and breathed new life into an otherwise plain barrel. I would recommend this item and buy one again for antoher project.

Nicely finished and fit is very good

After purchase of several YHM components, I've found them to have a reputation for good parts. This flip up sight gas block is no exception. The flip sight is easy to deploy, and once up and the cross pin engaged, the sight is in place tightly. In the down position, the sight is about the same height as the railed forend on the carbine. The sight height aligns with an A2 carry handle nicely.

A well made sight.

This sight was easy to install and comes with the front sight post and detent installed. Alligning it takes a little care, but I've installed two of these so far and both rifles ran great. Plus it's less expensive than other models. The railed model might be alittle heavier than some the other two, but that integral rail is a nice accessory.