KNS Adjustable Gas AK Pistons

$149.00

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Finally, a drop-in solution for taming the notoriously-overgassed AK platform. The patent-pending 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.

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Shipping rate is calculated based on the total order value. We have 3 tiers:

  • From $1 to $28 – in this tier shipping cost is $4.99
  • From $28 to $99 – in this tier shipping cost is $9.50
  • From $99 and up – in this tier shipping cost is $16.99

You may purchase merchandise from this Web site by using any one of the payment options listed in (link to Payment Options). AK Operators Union, Local 47-74 reserves the right to change its payment procedures at any time without prior notice to you.

AK Operators Union, Local 47-74, Inc. offers a 30-day return, refund and exchange policy.

You must contact (email: [email protected]) AK Operators Unio, Local 47-74, Inc. prior to any return. All returns must include the original invoice number (could be just note with it in the box).

Returns, refunds, and exchanges will take up to two weeks, not including transit times.It is recommended that you return merchandise with a carrier that offers tracking numbers and full value insurance on the parcels.

AK Operators Unio, Local 47-74, Inc. cannot be responsible for any packages that are lost while being shipped to us. Please note, that USPS Priority mail does not offer tracking capabilities on packages, and they will only initiate a trace on packages after a 30-day waiting period.

Items that are unused and in the original sealed packaging can be returned subject to a 15% restocking fee. The return must include accessories, manuals, documentation, and registration that were shipped with the product.

If the packaging has been opened on the unused product, the product can be returned subject to a 25% restocking fee. The return must include accessories, manuals, documentation, and registration that were shipped with the product.

Shipping charges and/or shipping costs are not subject to refunds. Products that are not subject to returns are custom configured products, used products, special orders, and items sold “as is” or “used”.

Return Address:

AK Operators Union
PO Box 100
Hartville MO 65667

Please include your invoice number in the box if you can.

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This is MOD 2.0 Version!

Finally, a drop-in solution for taming the notoriously-overgassed AK platform. The patent-pending 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 our 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. 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 our Adjustable Gas Piston System installed.

KNS 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 7.62×39, .308″, and 7.62x54r.

The MOST accurate way to ensure correct fitment of our piston to YOUR gun is for YOU to measure your working length & hole distance and compare it against our chart.

**When selecting your piston please refer to the chart on this page 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. We 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

Please ask if you are not sure about compatibility!

Rob demonstrates how to tune it. Look at the last scene when Rob makes full magazine dump from his Wasr10!

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KNS-Mod-2-Piston-Product-Sizing-Chart-Full Size

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