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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 This Is Version 2.0 by Blake, February 17, 2020
I was concerned when I ordered and asked CS if they knew if it was the original or the revised version with the new gas regulator. CS could not tell me, but when it arrived it was the new revision. I ordered the M92 version in February 2020. As a sid...
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15/15 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!
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.
1/1 found this helpful
Helpful Positive Review KNS Precision Adjustable Gas Piston System by Smash, Verified Owner, October 9, 2022
Really makes a world of difference. Used to tame my Sam-5 which was chucking steel into orbit. Use the large bore as the sam 5 really needed it. It kicks like a 22 now, really a phenomenal difference.
3/3 found this helpful
Helpful Positive Review KNS Valmet adj. gas piston for JRA Gallant by BT, Verified Owner, September 22, 2023
Installation was super easy. 1/8” roll pin punch and small hammer is all that was needed. Before installing the rifle was way over gassed. The brass was ejecting over 15 feet, recoil was excessive for the caliber and the carrier was bottoming out. It...
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3/3 found this helpful
Helpful Positive Review Great for your AK by Carmen, Verified Owner, November 5, 2023
Easy to install and to adjust. Works great if your AK is throwing your spent shells 25–30 ft. You have less recoil. Less recoil usually makes a better shooting experience. You’ll be shooting your AK a lot more than before.
1/1 found this helpful
Read All 91 Reviews
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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-M85, Black, AGP-A-5 , MPN: AGP-A-5 , UPC: 853906008256 , Code: 3GL-GCP-KNSAGP-AGP-A-5
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-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-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 -Draco, Black, AGP-A-7 , MPN: AGP-A-7 , UPC: 853906008379 , Code: 3GL-GCP-KNSAGP-AGP-A-7
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-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- AK74, Black, AGP-A-9 , MPN: AGP-A-9 , UPC: 853906008133 , Code: 3GL-GCP-KNSAGP-AGP-A-9
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-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-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-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-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-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- 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- PSL, Black, AGP-A-13 , MPN: AGP-A-13 , UPC: 853906008157 , Code: 3GL-GCP-KNSAGP-AGP-A-13
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-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 -SLR107UR, Black, AGP-A-1L , MPN: AGP-A-1L , UPC: 853906008522 , Code: 3GL-GCP-KNSAGP-AGP-A-1L
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- 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-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- 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- 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-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- 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- 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- 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
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
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
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
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 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-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 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-AIMS-74, Black, AGP-A-21 , MPN: AGP-A-21 , UPC: 853906008386 , Code: 3GL-GCP-KNSAGP-AGP-A-21
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
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