adams arms piston kit
4.50 out of 5 based on 6 customer ratings
(6 customer reviews)


Product Code: AA-FGAA-03107 Categories: ,

The Adams Arms AR-15 piston conversion kit is a high quality and user installable piston kit for the AR-15. The kit includes all of the parts needed to convert an AR-15 rifle from a gas driven system to piston system.


Product Description

This system will work with .223/5.56 x 45 mm NATO.

Kit includes:

  • Patented One-Piece Bolt Carrier
  • .750″” Picatinny Gas Block with 3 settings (full gas for standard fire, half gas for suppressed, no gas for single shot)
  • Gas Plug
  • Upper Receiver Bushing
  • Bushing Installation Rod
  • Bolt Spring
  • Drive Rod with Bushing and Spring
  • Installation Instruction Card

The Adams Arms Piston System:

  • A short stroke free floating piston system.
  • Is Self-Cleaning.
  • Carbon and gases are expelled forward, away from operator.
  • Corrosive resistant coating processes.
  • Harmonics are not transferred into the barrel.
  • Adjustable gas settings for various applications.
  • Doesn’t vent directly to atmospheric pressure; this eliminates flash signature and super sonic crack which is optimal for night vision and suppresses fire.

6 reviews for Adams Arms Carbine Length Piston Conversion Kit

  1. 5 out of 5

    (verified owner):

    I have installed this kit and works great. This makes cleaning much faster and easier. I can also use the cheaper ammo and not foul out. I have several friend who have done the same.

  2. 5 out of 5


    I have a carbine length Adams Arms kit on my Seekins billet build. The hardest thing about a piston kit is finding a free float rail that clears the piston.YHM Todd Jarret do not work. Midwest Industries and Samson are two that I have that do fit. Also, with a piston it takes a little more gas pressure to cycle the weapon. So if you were close to being under gassed before, you might have some short stroking with any piston kit when using low pressure .223. You may just have to have the gas port increased one size. Adams Arms is definitely the best piston kit out there!

  3. 5 out of 5


    High quality kit. Easy enough installation, and I am no armorer. Good video instructions included. Fit on a Stag AR smooth as silk and functioned flawlessly. No more gas in the face or hard-carbon bolt cleanup. Western Sport had the best price I could find and shipped quickly.

  4. 3 out of 5


    Kit is nice quality but the carrier’s cam pin channel was out of spec so I had to remove material. Otherwise it’s a great piston system.

  5. 5 out of 5


    Almost every part in my package was out of place; in other words, scrambled.

  6. 4 out of 5


    Great product from AA. I have two 7.62x 39 upper assemblies with this piston system. Just need to 25% increase the gas port for the cylic of the bolt carrier.. So far, no issues.

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Additional information

Weight1.25 lbs
Custom Product Category

Piston Kit