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A2 Stock

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Parts needed:

  • A takedown pin (smaller of the two large pins)
  • A takedown pin spring
  • A takedown pin detent
  • A stock
  • A buffer extension
  • A retainer
  • A retainer spring
  • A buffer
  • A buffer spring

Tools needed:

  • #10 (or larger) flat-blade screwdriver


  1. Insert the retainer spring and the retainer into the recess in the lower.
  2. Install the buffer extension tube and press the detent when necessary. Next torque to 35-39 ft - lbs to add a spacer onto the stock tube and insert the stock.
  3. Install the takedown pin with the groove to the rear and install the detent and the spring from the rear of the receiver.
  4. Compress the spring with the stock and secure the stock in place with the self-locking screw.
  5. Insert the stock screw from the rear into the stock.
  6. With the hammer down, insert the buffer spring and the buffer into the buffer tube until the retainer snaps up to lock it in place.

Ask Yourself: Does the takedown pin and buffer retainer function?


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