Butt Stock Chassis Extension


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  • Allows use of AR fixed stocks that do not use a carbine buffer tube
  • Black anodized aluminum blending extension
  • Fits PMACA Chassis
  • Integrated locking mechanism
  • Provides a smooth transition from the PMACA chassis to the butt stock


  • 6061-T6 Aluminum
  • Weight: 3.4 Oz
  • Fits PMACA Chassis


 The Butt Stock Chassis Extension blends the transition from the butt stock to the PMACA chassis.  It integrates the locking mechanism typically implemented using a lock ring with two integrated sliding components.

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  • 5
    butt stock extension

    Posted by Daniel Dumitru on Dec 12th 2020

    Well made, excellent fit to standard AR platforms, fast shipping

  • 5
    Butt stock ext.

    Posted by Richard Sechowski on Aug 6th 2020

    Fits absolutely perfect on my Ruger 10/22 rifle couldn't be any happier. Thank you