JMAC: MRKT Trunnion for AKMS Underfolder and Pistols

Brand :

(No reviews yet) Write a Review

(M)odular(R)ear(K)alashnikov(T)runnion for AKMS UnderFolder


Our Modular Rear Kalashnikov Trunnion is designed to allow the installation of 1913 rails, M4 Stocks, ACE/Stormwerks Hinges and stocks, and in the near future wood stocks from IronWoodDesigns!

It Replaces your current Rear Trunnion and has adapters to allow you to use the majority of the stocks on the market!!

Go ahead and stake that castle nut because you don’t need to disassemble the buffer tube to swap adapters! The bolt threads into the adapter from the inside of the receiver! You can swap back and forth between stocks in under 1 min!

These will be the #1 Choice for new builds as they allow you to be flexible later and not get stuck with one type of stock.

Drop this in a pistol build and install pretty much ANY brace on the market or Form 1 and SBR later!


  • Direct Replacement for AKMS Underfolders/Pistols (Russian, Polish, Hungarian)
  • 4140 HT
  • Black Nitride
  • Includes 2 cover plates and screws

Updated video coming soon, the trunnion itself has the ACE holes drilled and tapped


Fitment Compatibility Chart

This product fits the following:

Manufacturer / Importer Model Caliber Barrel Length
WBP Lynx 7.62x39 10
WBP Mini Jack 7.62x39 10