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Questions & Answers
Which model will work for a PSA AK 105? Expert Answer

The best way to determine what model KNS Precision Adjustable Gas Piston System fits your PSA AK 105 is to measure your current system and compare it to the chart of the left side of the product page in the product images.

by Hunter, Gear Expert, June 10, 2022
Will the AGP-A-4 work in the Zastava zpap92? Expert Answer

The MOST accurate way to ensure correct fitment of the piston to your gun is for you to measure your working length & hole distance and compare it against the chart on the product page.

by Ben, Gear Expert, January 29, 2021
Customer Reviews
Helpful Positive Review
Good AK Gas Piston Choice by Will, Verified Owner, October 12, 2025
After doing some research I decided to on a KNS gas piston for my Galil 386. Most AK rifles are over gassed by necessity but this piston allows the user to adjust for a variety of ammunition. Optics Planet’s sale event saved me $40. I plan to upgrade...
Read More...
1/1 found this helpful
Helpful Positive Review
remember how many clicks worked for you by Jerry, Verified Owner, July 31, 2021
In the beginning I do 10 click increments to figure out where the piston needs to be to be barely ejecting cases then I dial up 5 more to make it slightly overgassed for reliability sake. When cleaning it’s easy to mess up so I usually write down my ...
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7/7 found this helpful
Helpful Positive Review
KNS Gas Piston for AK47 by Al, Verified Owner, August 28, 2025
The KNS piston is an excellent product I recommend for every AK variant owner. The install was easy with a hand drill, punch and hammer. My Chinese Mac 90 variant was so overgassed with a suppressor it was malfunctioning. It was very simple to tune i...
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1/1 found this helpful
Helpful Positive Review
works great on my wbp jack 762. by AudiGSP, Verified Owner, March 13, 2024
Really tamed my obscenely overgassed wbp jack 7.62sc. Shoots a little harder than my 5.56 MCX now. Crazy! I dont shoot suppressed, just didnt need my ak bouncing around so hard. I am a firm supporter of this piston now.
2/2 found this helpful
Helpful Positive Review
Galil Ace Gen 2 by Brett, Verified Owner, January 9, 2025
I have the 13" 7.62x39. stock, this was flinging rounds 20 ft and i wanted to suppress. Ordered the AGPA8 and with port fully open, even suppressed, 10 ft and WAY smoother operation. Game changer!
2/2 found this helpful
Helpful Positive Review
Kns zpap85 piston by Aimatdeet, Verified Owner, January 12, 2024
All the way off for low power steel ammo. 15 clicks for hotter brass. Waiting on adapter to try supressed. Makes it even softer shooting than before.
1/1 found this helpful
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made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for KNS Precision Adjustable Gas Piston System

Finally, a drop-in solution for taming the notoriously-overgassed AK platform. The patent-pending KNS Precision Adjustable Gas Piston System is a replacement for the AKs piston head that attaches to the bolt carrier in about 10 minutes with no major gunsmithing or permanent modification required. KNS Precision designed these Rifle Parts to grant the user an extremely wide range of gas adjustment for suppressed and unsuppressed use, as well as a variety of different kinds of ammunition.image

A good rule of thumb to determine if our piston will be useful, is if your gun throws the brass more than 15 feet. This can, but not always 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 over-gassed gun shoots with our Adjustable Gas Piston System installed.

There are many variants within this family of weapons and the only way to truly make certain you are getting the right system is by precisely measuring your existing piston and comparing them to the chart.

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

Specifications for KNS Precision Adjustable Gas Piston System:

Manufacturer: KNS Precision
Finish: Black
Fabric/Material: Stainless Steel
Gun Model: AK-74, AK-47
Condition: New
Country of Origin: USA

Features of KNS Precision Adjustable Gas Piston System:

  • Key Benefits:
  • Tool-Free Adjustment
  • Reduces Recoil
  • Tune almost any AK for suppressed use
  • Decrease cyclic rate for full-auto fire
  • made in specialized factories 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

Package Contents:

  • KNS Precision Adjustable Gas Piston System

KNS Precision Adjustable Gas Piston System Orderable Models

List of Orderable Models

  • KNS Precision Adjustable Gas Piston System- AKM Large Bore, Black, AGP-A-10 , MPN: AGP-A-10 , UPC: 851876003318 , Code: 3GL-GCP-KNSAGP-AGP-A-10
  • KNS Precision Adjustable Gas Piston System-Galil Ace Rifle, Black, AGP-A-8 , MPN: AGP-A-8 , UPC: 853906008270 , Code: 3GL-GCP-KNSAGP-AGP-A-8
  • KNS Precision Adjustable Gas Piston System- M92, Black, AGP-A-4 , MPN: AGP-A-4 , Code: 3GL-GCP-KNSAGP-AGP-A-4
  • KNS Precision Adjustable Gas Piston System-Aresenal Rifle, Black, Large, AGP-A-20L , MPN: AGP-A-20L , UPC: 853906008355 , Code: 3GL-GCP-KNSAGP-AGP-A-20L
  • KNS Precision Adjustable Gas Piston System -Draco, Black, AGP-A-7 , MPN: AGP-A-7 , UPC: 853906008379 , Code: 3GL-GCP-KNSAGP-AGP-A-7
  • KNS Precision Adjustable Gas Piston System-Valmet M76, Black, Large, AGP-A-18 , MPN: AGP-A-18 , UPC: 853906008324 , Code: 3GL-GCP-KNSAGP-AGP-A-18
  • KNS Precision Adjustable Gas Piston System-Galil Ace Pistol-5.56/7.62x39, Black, AGP-A-25 , MPN: AGP-A-25 , UPC: 853906008423 , Code: 3GL-GCP-KNSAGP-AGP-A-25
  • KNS Precision Adjustable Gas Piston System-M85, Black, AGP-A-5 , MPN: AGP-A-5 , UPC: 853906008256 , Code: 3GL-GCP-KNSAGP-AGP-A-5
  • KNS Precision Adjustable Gas Piston System-AKM, Black, Small, AGP-A-10S , MPN: AGP-A-10S , UPC: 853906008416 , Code: 3GL-GCP-KNSAGP-AGP-A-10S
  • KNS Precision Adjustable Gas Piston System-7.62 Krinkov, Black, AGP-A-3 , MPN: AGP-A-3 , UPC: 853906008249 , Code: 3GL-GCP-KNSAGP-AGP-A-3
  • KNS Precision Adjustable Gas Piston System- VEPR, Black, Small, AGP-A-16S , MPN: AGP-A-16S , UPC: 853906008287 , Code: 3GL-GCP-KNSAGP-AGP-A-16S
  • KNS Precision Adjustable Gas Piston System-Aresenal Rifle, Black, Small, AGP-A-20S , MPN: AGP-A-20S , UPC: 853906008362 , Code: 3GL-GCP-KNSAGP-AGP-A-20S
  • KNS Precision Adjustable Gas Piston System-Bulgarian AK74, Black, AGP-A-17 , MPN: AGP-A-17 , UPC: 853906008294 , Code: 3GL-GCP-KNSAGP-AGP-A-17
  • KNS Precision Adjustable Gas Piston System-AMD65, Black, AGP-A-6 , MPN: AGP-A-6 , UPC: 853906008263 , Code: 3GL-GCP-KNSAGP-AGP-A-6
  • KNS Precision Adjustable Gas Piston System-Bulgarian 5.45 Krinkov, Black, AGP-A-19 , MPN: AGP-A-19 , UPC: 853906008348 , Code: 3GL-GCP-KNSAGP-AGP-A-19
  • KNS Precision Adjustable Gas Piston System-C39V2 Pistol, Black, Large, AGP-A-23L , MPN: AGP-A-23L , UPC: 853906008461 , Code: 3GL-GCP-KNSAGP-AGP-A-23L
  • KNS Precision Adjustable Gas Piston System- VEPR Large Bore, Black, AGP-A-16XX , MPN: AGP-A-16XX , UPC: 853906008140 , Code: 3GL-GCP-KNSAGP-AGP-A-16XX
  • KNS Precision Adjustable Gas Piston System-Mini Draco, Black, AGP-A-26 , MPN: AGP-A-26 , UPC: 853906008447 , Code: 3GL-GCP-KNSAGP-AGP-A-26
  • KNS Precision Adjustable Gas Piston System -SLR107UR, Black, AGP-A-1L , MPN: AGP-A-1L , UPC: 853906008522 , Code: 3GL-GCP-KNSAGP-AGP-A-1L
  • KNS Precision Adjustable Gas Piston System- PSL, Black, AGP-A-13 , MPN: AGP-A-13 , UPC: 853906008157 , Code: 3GL-GCP-KNSAGP-AGP-A-13
  • KNS Precision Adjustable Gas Piston System- AK74, Black, AGP-A-9 , MPN: AGP-A-9 , UPC: 853906008133 , Code: 3GL-GCP-KNSAGP-AGP-A-9
  • KNS Precision Adjustable Gas Piston System-7.62 Krinkov, Black, Small, AGP-A-3S , MPN: AGP-A-3S , Code: 3GL-GCP-KNSAGP-AGP-A-3S
  • KNS Precision Adjustable Gas Piston System-C39V2 Pistol, Black, Small, AGP-A-23S , MPN: AGP-A-23S , UPC: 853906008454 , Code: 3GL-GCP-KNSAGP-AGP-A-23S
  • KNS Precision Adjustable Gas Piston System- 5.45 Krinkov, Black, AGP-A-1 , MPN: AGP-A-1 , UPC: 853906008225 , Code: 3GL-GCP-KNSAGP-AGP-A-1
  • KNS Precision Adjustable Gas Piston System-WZ89 Onyks, Black, AGP-A-2 , MPN: AGP-A-2 , UPC: 853906008232 , Code: 3GL-GCP-KNSAGP-AGP-A-2

KNS Precision Adjustable Gas Piston System Unavailable & Discontinued Models

List of Unorderable Models

  • USED, KNS Precision Adjustable Gas Piston System-Aresenal Rifle, Black, Small, AGP-A-20S , MPN: AGP-A-20S-EDEMO , Code: 3GL-GCP-KNSAGP-AGP-A-20S-EDEMO-IN-D
  • USED, KNS Precision Adjustable Gas Piston System-Valmet M76, Black, Large, AGP-A-18 , MPN: AGP-A-18-EDEMO , Code: 3GL-GCP-KNSAGP-AGP-A-18-EDEMO-RE-C
  • USED, KNS Precision Adjustable Gas Piston System-7.62 Krinkov, Black, AGP-A-3 , MPN: AGP-A-3-EDEMO , Code: 3GL-GCP-KNSAGP-AGP-A-3-EDEMO-IN-C
  • USED, KNS Precision Adjustable Gas Piston System- AK74, Black, AGP-A-9 , MPN: AGP-A-9-EDEMO , Code: 3GL-GCP-KNSAGP-AGP-A-9-EDEMO-RE-B
  • USED KNS Precision Adjustable Gas Piston System-Valmet M76, Black, Large, AGP-A-18L, EDEMO2, Condition Parts Only/Salvage, Wrong Product , MPN: AGP-A-18L-EDEMO2 , Code: 3GL-GCP-KNSAGP-AGP-A-18L-EDEMO-WP-F
  • USED, KNS Precision Adjustable Gas Piston System- AK74, Black, AGP-A-9 , MPN: AGP-A-9-EDEMO , Code: 3GL-GCP-KNSAGP-AGP-A-9-EDEMO-RE-C
  • USED KNS Precision Adjustable Gas Piston System-Aresenal Rifle, Black, Small, AGP-A-20S, EDEMO1, Condition Fair, Other , MPN: AGP-A-20S-EDEMO1 , Code: 3GL-GCP-KNSAGP-AGP-A-20S-EDEMO-OT-D
  • USED, KNS Precision Adjustable Gas Piston System-AMD65, Black, AGP-A-6 , MPN: AGP-A-6-EDEMO , Code: 3GL-GCP-KNSAGP-AGP-A-6-EDEMO-IN-C
  • USED KNS Precision Adjustable Gas Piston System- AKM Large Bore, Black, AGP-A-10, EDEMO2, Used, Condition Like New , MPN: AGP-A-10-EDEMO2 , Code: 3GL-GCP-KNSAGP-AGP-A-10-EDEMO2
  • USED KNS Precision Adjustable Gas Piston System- AKM Large Bore, Black, AGP-A-10, EDEMO3, Condition Like New, Used , MPN: AGP-A-10-EDEMO3 , Code: 3GL-GCP-KNSAGP-AGP-A-10-EDEMO-US-A
  • USED KNS Precision Adjustable Gas Piston System- AK74, Black, AGP-A-9, EDEMO3, Used, Condition Like New , MPN: AGP-A-9-EDEMO3 , Code: 3GL-GCP-KNSAGP-AGP-A-9-EDEMO3
  • USED, KNS Precision Adjustable Gas Piston System-Galil Ace Rifle, Black, AGP-A-8 , MPN: AGP-A-8-EDEMO , Code: 3GL-GCP-KNSAGP-AGP-A-8-EDEMO-RE-B
  • USED KNS Precision Adjustable Gas Piston System- AK74, Black, AGP-A-9, EDEMO4, Used, Condition Good , MPN: AGP-A-9-EDEMO4 , Code: 3GL-GCP-KNSAGP-AGP-A-9-EDEMO4
  • USED KNS Precision Adjustable Gas Piston System- AKM Large Bore, Black, AGP-A-10, EDEMO1, Condition Parts Only/Salvage, Wrong Product , MPN: AGP-A-10-EDEMO1 , Code: 3GL-GCP-KNSAGP-AGP-A-10-EDEMO-WP-F
  • KNS Precision Adjustable Gas Piston System-Valmet M76, Black, Small, AGP-A-18S , MPN: AGP-A-18S , UPC: 853906008331 , Code: 3GL-GCP-KNSAGP-AGP-A-18S
  • USED KNS Precision Adjustable Gas Piston System-Bulgarian 5.45 Krinkov, Black, AGP-A-19, EDEMO1, Used, Condition Fair , MPN: AGP-A-19-EDEMO1 , Code: 3GL-GCP-KNSAGP-AGP-A-19-EDEMO1
  • USED KNS Precision Adjustable Gas Piston System- M92, Black, AGP-A-4, EDEMO1, Used, Condition Fair , MPN: AGP-A-4-EDEMO1 , Code: 3GL-GCP-KNSAGP-AGP-A-4-EDEMO1
  • KNS Precision Adjustable Gas Piston System-Galil Ace Arm, Black, AGP-A-24 , MPN: AGP-A-24 , UPC: 853906008478 , Code: 3GL-GCP-KNSAGP-AGP-A-24
  • USED KNS Precision Adjustable Gas Piston System- AKM Large Bore, Black, AGP-A-10, EDEMO4, Used, Condition Good , MPN: AGP-A-10-EDEMO4 , Code: 3GL-GCP-KNSAGP-AGP-A-10-EDEMO4
  • KNS Precision Adjustable Gas Piston System-Galil Ace Rifle, Black, Large, AGP-A-8L , MPN: AGP-A-8L , UPC: 853906008409 , Code: 3GL-GCP-KNSAGP-AGP-A-8L
  • KNS Precision Adjustable Gas Piston System-M76, Black, AGP-A-11 , MPN: AGP-A-11 , UPC: 853906008300 , Code: 3GL-GCP-KNSAGP-AGP-A-11
  • KNS Precision Adjustable Gas Piston System-Galil Ace Arm, Black, Large, AGP-A-24L , MPN: AGP-A-24L , UPC: 853906008485 , Code: 3GL-GCP-KNSAGP-AGP-A-24L
  • KNS Precision Adjustable Gas Piston System-AK-105-JBI Custom, Black, AGP-A-22 , MPN: AGP-A-22 , UPC: 853906008393 , Code: 3GL-GCP-KNSAGP-AGP-A-22
  • KNS Precision Adjustable Gas Piston System-AIMS-74, Black, AGP-A-21 , MPN: AGP-A-21 , UPC: 853906008386 , Code: 3GL-GCP-KNSAGP-AGP-A-21
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