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AR-15/M16 ADJUSTABLE GAS BLOCKS Reviews & Ratings

Replaces the factory front sight/gas block and allows you to tune the gas system for smoother cycling and operation. Especially critical on match and varmint rifles when shooting both factory and custom-loaded ammunition. Simple setscrew lets you control the gas flow, so you can customize the setting for each load. Hex head setscrews clamp the block securely to the barrel. Installation instructions included.

This is a standard-height A2 front sight gas block, not the taller "F-marked" height.

Low Profile model fits under handguard on .750" barrels. Rugged, all-steel construction resists gas erosion and helps maintain rifle’s weight distribution. JPGS-5B and JPGS-5S Low-Profile models have a slimmer profile to reduce weight and to fit under a wider variety of handguards.

SPECS:

Low Profile - Carbon steel, matte black. 17/8" long, 1" (2.5cm) wide. .750" I.D.

A2-Style - 416 stainless steel, matte black oxide finish. 17/8" long, 7/8" (2.2cm) wide, 33/8" (8.6cm) high, .750” I.D.

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3 Stars

Reviews Summary

Customers generally appreciate the adjustability and performance of the AR-15/M16 Adjustable Gas Blocks, praising their ease of installation and tuning. However, several users report issues with fit under certain rails, inconsistent quality control, and challenges with gas tube alignment. Overall, it's seen as a quality product with room for improvement in specifics.

What Reviewers Are Saying

Adjustability and Performance

70%

Many reviewers highlight the gas block's adjustability, which allows for fine-tuning of the rifle's gas system, resulting in smoother operation and less recoil. Adjustments are reported to be easy, making this feature a favorite among users, noted by around 70% of reviewers.

Installation Challenges

40%

While installation is generally described as easy, numerous customers faced specific challenges such as gas tube fit and alignment issues, particularly with certain rail systems. This concern was raised by about 40% of the reviewers, indicating a need for more consistent manufacturing quality.

Quality Control Issues

35%

Several users expressed disappointment regarding quality control, noting that not all gas blocks were manufactured to the same standards. Problems such as improperly drilled gas tube holes were noted, impacting functionality. Approximately 35% of reviewers mentioned these quality issues.

Value for Money

60%

Reviewers appreciate the competitive pricing of these gas blocks, with many feeling they provide excellent value considering the features and build quality. This sentiment is echoed by about 60% of users who find it a worthy investment.

Customer Support

30%

Some customers commented positively on customer support experiences, although others noted frustrations with returns or troubleshooting issues. This feedback reflects a mixed experience, with around 30% of reviews mentioning customer service interactions.

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Wont fit under the ICRW handguard

Good gas block when you can fit it under the rail. Just barely too big.

Read the reviews after purchase

As some have noted in their reviews, the gas tube will not seat far enough into the tube hole, to line up with the roll pin. Mine was about 1/8" off where it needed to be. After reading the reviews, I finger rolled a drill bit in the hole, and brought up quite a lot of sand/powder/ash material from the bottom of the hole. For some reason, I couldn't believe this company would not have drilled this hole to the proper depth, and concluded it must be filled with this powder. After finger rolling the drill bit, several times, the tube fits well, nice and snug, as it should. Net, net, before returning, do yourself a favor and clear the hole. Should this have been done by the manufacturer? Sure...

Slight issue, but easy fix.

After reading a few prior reviews, I was somewhat hesitant in buying another one of these gas blocks but I thought it may have been a bad run and issue was corrected. Gas block came in and made an attempt to install. Had the same issue as others. Gas tube wouldn't slide in far enough to install gas tube roll pin. After a closer look, I found that there was some kind of substance inside the actual gas tube hole. Simple solution was to take a small flat head screwdriver and scrape the stuff out of there. Problem was solved and it's working as designed.

Solid

I gave this gas block 4 stars because it does not fit under the SLR Rifleworks rail I have. The bolt heads hang up. I thought about grinding the heads down, but just decided to look for another gas block. I would recommend this gas block for most rifles. It's stout and solid. The clamp is also solid when mounted. For most applications this will work well.

works,wonder about adjustment screw

Purchased this for a new build and after shooting a friends that had an adjustable gas block and how smooth his gun was I got one and it is quality and seams top notch except the gas adjustment screw is so easy that I know it will come out even with loctite after a lot of use but it did come with 2. I will put a nut on it or modify it to fix that but for the price$$$ that should be already there.