PMACA Lock Ring

$16.95 - $21.95
(No reviews yet) Write a Review


  • Fits PMACA Chassis - NOTE: All new PMACA chassis come with a Lock ring.  
  • Locks the buffer tube rotation with respect to the chassis
  • All Anodized Chassis are sold with a Cadmium plated lock ring included. 
  • The Cerakote Lock ring can be purchased as an upgrade where the additional price is the difference between the Cerakote and Cadmium plated Lock Ring. 


  • OD: 1.4"
  • ID: 1.21"
  • Max Thickness: 0.19"
  • Material: Steel
  • Finish options:
    • Cadmium metal
    • Cerakote


The PMACA Lock Ring provides a way to positively lock the position of the buffer tube.  This prevents the stock from rotating and keeps it aligned with the chassis.   This Lock ring provides the same function as an AR endplate.