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AK ADJUSTIBLE GAS PISTON Reviews & Ratings

Finally, a drop-in solution for taming the notoriously-overgassed AK platform. The patented KNS AK Adjustable Gas Piston is a replacement for the AK's piston head that attaches to the bolt carrier in about 10 minutes with no major gunsmithing or permanent modification required. The user is granted an extremely wide range of gas adjustment for suppressed and unsuppressed use, as well as a variety of different kinds of ammunition.

A good rule of thumb to determine if KNS Precision piston will be useful, is if your gun throws the brass over 15 feet. This can signify excess gas pushing the carrier back at a higher velocity and pressure, than is needed for effective operation. Most (but not all) AK's are over-gassed. This causes more recoil, more wear and tear, and less controllability. Many users are surprised to feel the difference in how their gun shoots with KNS Precision Adjustable Gas Piston System installed.

Variations in the AK platform, the use of some aftermarket parts and a properly tuned and gassed firearm may not greatly enhance the performance and may impede function due to under-gassing or interference.

KNS Precision have redesigned and improved the adjustment collar for your AK Adjustable Gas Piston. With robust collar geometry and the addition of a roller detent, this version is MUCH stronger and protects all critical components from impact.

There is no need to remove or replace your gas block for adjustability. Just change the piston and go shoot.

Small Bore/Caliber pistons are for .223", 5.56mm, and 5.45mm. They work better in AK's of ALL CALIBERS with less excess gas.

Large Bore/Caliber pistons are for 7.62x39, .308", and 7.62x54r.

**When selecting your piston please refer to the chart to ensure maximized compatibility with your firearm.**

***A small percentage of Commercial Spec firearms have the piston welded to the carrier, instead of the usual Rivet holding in the Piston. KNS Precision recommend purchasing a new carrier for the easiest installation.***

**** Vepr and Saiga Pistons will require drilling through the op-rod after screwing the piston into the carrier, due to variations in the staking location. These Op-Rods are Phosphated instead of Nitrided to allow easy drilling.****

KEY BENEFITS

Updated Mod 2 Collar
Tool-Free Adjustment
Reduces Recoil
Tune almost any AK for suppressed use
Decrease cyclic rate for full-auto fire
US-made 922r Compliance Part
Piston head assembly made from corrosion-resistant stainless steel
All surface parts nitrided for durable, low-friction, & easily cleaned operation
Patent Number 10,330,480

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3 Stars

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1 Stars

Reviews Summary

The AK Adjustable Gas Piston receives high praise for its performance and ease of installation. Users report significantly reduced recoil and improved follow-up shooting, especially in over-gassed AK models. While some mention challenges with installation, most express satisfaction with the product's quality and effectiveness, making shooting much more enjoyable.

What Reviewers Are Saying

Product Performance

65%

Reviewers consistently highlight the enhanced shooting experience provided by the KNS piston, noting reduced recoil and improved accuracy during follow-up shots, particularly in over-gassed AK models. This theme is mentioned in 65% of reviews.

Installation Ease

55%

Many customers appreciate the straightforward installation process, with most feeling confident to tackle the task with minimal mechanical experience. However, some caution that not all installations are easy, suggesting consulting a professional if uncertain. This theme appears in 55% of reviews.

Product Quality

70%

The overall quality of the KNS gas piston is frequently praised, with users noting its solid construction and reliability. Positive remarks confirm that KNS continues to produce high-quality components for firearms. This sentiment is captured in 70% of reviews.

Support and Service

40%

Several reviews mention positive experiences with customer support and service, including assistance with installation and product inquiries. Customers feel supported by KNS and value their responsiveness. This is reflected in 40% of reviews.

Adjustability and Customization

50%

Users appreciate the adjustable nature of the gas piston, which allows for fine-tuning of performance depending on the firearm and ammunition used. This feature is lauded as essential for optimizing shooting experiences, especially with suppressors. This theme is noted in 50% of reviews.

Installation Challenges

30%

While overall installation is deemed easy, a few users faced challenges specifically with drilling out the OEM piston rivet or pin, indicating that these steps can be more complicated than described in instructional materials. This concern is mentioned in 30% of reviews.

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Install can be difficult

The piston itself is solidly constructed and well made, but both KNS instructions and the Brownells YouTube make removing the OEM piston rivet/pin look a lot easier than it is, and have a pilot hole pre- drilled in the vid. Think very carefully before before deciding to drill it out yourself, and take it to a smith if you’re not confident.

Quality product, performs well

I added this piston to a heavy barrel PSL chambered in 6.5Grendel. I originally wanted to install an adjustable gas block, but when that became too much of a project, I decided on the KNS adjustable piston. Just what the doctor ordered! Now the empty cases don't end up in the next county, they're thrown about 10 feet. Recoil (as much as I get with a 9lb rifle firing a Grendel) is reduced also. I had to drill new holes to get the roll pin to install, because the factory holes didn't line up with my carrier. That little detail cost a star, so I only gave it 4 stars.