KNS Precision Adjustable Gas Piston System - AKM

Manufactured by KNS Precision
Manufactured by KNS Precision
7 Reviews

In Stock

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The KNS Precision Adjustable Gas Piston System offers a tunable solution for over gassed AK47/74 pattern weapons. Rifles that throw brass more than 15 feet upon firing may greatly benefit from the Adjustable Gas Piston System by allowing you to dial back the gas system for better controllability, improved recoil mitigation, and reduced wear and tear. This drop-in solution installs in minutes without the need for a gunsmith or permanent modification to the firearm in most cases.

  • Compatible with AKM pattern rifles
  • Stainless steel construction
  • Black nitrided for corrosion resistance
  • Reduced recoil
  • Less wear and tear
  • Improved controllability
  • Wide range of adjustment
  • No major gunsmithing
  • Installs quickly in about 10 minutes
  • Drop-in solution
  • Decrease full-auto cyclic rate of fire
  • 922r compliance part
  • Made in the U.S.A.
  • For suppressed and unsuppressed use
KNS Precision Inc. is a Texas based machine shop manufacturing parts for the AR-15/M16 and AK47/74  platforms. Perhaps best known for their anti-rotational hammer/trigger pins, KNS Precision manufactures everything from iron gun sights to AR receiver pins to AK gas pistons.
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BrandKNS Precision
MaterialSteel - Stainless
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

7 reviews

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Solved my issues! Would buy again.

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I very rarely receive anything, but this makes me happy. Let me start by saying that I have a C39v2 that was way over gassed. The rifle was ejecting casings 25-30ft away from me and the carrier and bolt were taking a beating after just 120 rounds. I am now using a 1960 Polish milled carrier, with a 1960 Polish milled telescopic recoil spring assembly.

I must say, I am very pleased with the results. For my situation, I had to turn the gas collar about 26 clicks from close, give or take a couple. My rifle now ejects spent casings 5-6 feet away and cycles like a dream.

The hype is real and you get the bang for your buck

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I've read many reviews and so many videos about this product and was a bit skeptical. I didn't believe that it would change the world but not underperformed since it was from a reputable company

Boy was I surprised. The installation was straightforward and easy and arrange trip and suit soon afterwards. The kns piston perform as advertised. It's moved out the recoil pattern and kept my ejection pattern at the two o clock position. My akm feels like a 20in barrel AR when I shoot it now. Combining it with the bd2 brake makes it feels amazing and is an eye catcher on the Range. People are amazed when they see it in action but are Starstruck when they shoot it. If you have to make a modification to your AK I advise this piston right here.

Get this for your AK Yesterday


This is by far one of the best things to get to improve your AK platform weapon system. This is by far easier to install than an adjustable gas block and front sight combo. Simple to use and tune to your rifle once you get to the range. Personal recommendation is to scribe the amount of clicks you use on the weapon system in some way or put some sort of note in the pistol grip on where your settings are as a CYA insurance.

A must for suppressed AK's

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If you're shooting your AK suppressed, do yourself a favor and put an adjustable piston in. Night and day difference in recoil impulse and slows down bolt speed so you're not beating your rifle up.

Outstanding upgrade


Installed per instructions. Adjusted per instructions. Ejection distance is about three feet, 4 o'clock, and consistent. Reduces bolt carrier velocity so it does not slam into the rear of the receiver as hard, therefor reducing recoil significantly. Combined with a VG6 brake, rapid fire groups and splits between shots are terrific. I only have about 700 rds through the rifle after install. I'd like to read a review about higher round counts to demonstrate longevity. But so far It was worth every penny.

Great option

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I was building out my AK (WASR-10) to be suppressed and improve the ergonomics. This was a solid option for mitigating a lot of the felt recoil from suppressor use. This will save your AK in the long run in terms of parts wear. Install was generally specific. Drill a hole where the roll pin is that keeps your current piston in place with the bolt assembly. Hammer it out with a punch and then reverse order for this KNS piston. As for shooting, I put about 200 rounds through it for ensured reliability and obviously adjusting. Adjust period was easy, open the adjuster all the way so it doesn’t cycle when ran. Make a few adjustment clicks and see if it cycles. Repeat to the setting that you like most. After that your AK will feel like a whole different rifle and it doesn’t feel like you’re shooting 7.62. Worth the money.

Best AK mod

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Great product. Easy install and does what it is supposed to. I will put one of these on all my shooter AKs.