How to Use an AR-15 Buffer Retainer Kit?: Steps to Follow

Author: Alex Smith

An AR-15 buffer retainer kit is essential for ensuring the proper function of your rifle’s buffer system. The buffer retainer keeps the buffer tube and spring in place, crucial for the rifle’s cycling and recoil management. Here’s a detailed guide on how to use an AR-15 buffer retainer kit.

Gather Your Tools and Parts

Before you start, ensure you have all the necessary tools and parts. You will need:

  • AR-15 buffer retainer kit (includes retainers, springs, and pins)
  • A small punch or pin pusher
  • A small hammer or mallet
  • A pair of needle-nose pliers
  • Safety glasses
Ensure Safety

Always prioritize safety when handling firearms and their components. Before beginning any work, make sure your AR-15 is unloaded and the chamber is clear.

Disassemble the Upper Receiver

You need to disassemble the upper receiver to access the buffer retainer area. Here’s how:

  • Remove the Upper Receiver: Push the takedown pins and separate the upper from the lower receiver.
  • Remove the Buffer Tube Assembly: Unscrew the buffer tube from the receiver extension. You may need to compress the buffer spring to remove the tube.
Locate the Buffer Retainer Slot

The buffer retainer slot is in the lower receiver below where the buffer tube mounts. This slot is crucial for holding the buffer retainer in place.

Install the Buffer Retainer
  • Insert the Retainer: Place the buffer retainer into the slot. The retainer has a small pin that fits into a hole in the receiver. Align the retainer so that it fits snugly into the slot.
  • Secure with the Retainer Pin: Use a small punch or pin pusher to drive the retainer pin into place. Gently tap the pin with a small hammer until it is fully seated. Ensure it is flush with the receiver.
  • Insert the Buffer Spring: Place the buffer spring into the buffer tube. When installing the buffer, the spring should sit evenly inside the tube and slightly compress.
Install the Buffer and Tube Assembly
  • Insert the Buffer: Slide the buffer into the buffer tube. Ensure that the buffer aligns appropriately with the buffer spring.
  • Attach the Buffer Tube: Screw the buffer tube back into the receiver extension. Make sure it is tightened securely, but do not over-torque.
Reassemble the Upper Receiver
  • Reattach the Upper Receiver: Align the upper receiver with the lower receiver and push the takedown pins back into place. Ensure that the upper and lower receivers are properly aligned and secured.
Test Functionality
  • Cycle the Action: Manually cycle the action to ensure the buffer and spring function correctly. The buffer should move freely within the buffer tube, and the retainer should hold it.
  • Check for Proper Operation: Ensure no excessive play or binding. The buffer retainer should be securely in place, and the buffer should not move excessively.
Final Check
  • Inspect for Proper Fit: Verify that all components are installed correctly and that there is no interference or misalignment. Ensure the buffer retainer is securely held in place by the pin.
  • Perform a Safety Check: Before using the rifle, perform a final safety check to ensure everything functions correctly.
Tips and Warnings
  • Use Proper Tools: Always use the correct tools for installation to avoid damaging components.
  • Avoid Over-Tightening: Be cautious not to over-tighten the buffer tube, as this can cause damage to the threads or the receiver.
  • Regular Maintenance: Regularly inspect the buffer retainer and related components to ensure they are in good condition.
In Conclusion

Following these steps will help you properly install and use an AR-15 buffer retainer kit, ensuring your rifle functions smoothly and reliably.