AR Buffer Retainer Pin

AR-15/AR-10 Buffer Retainer Pin retains the buffer and buffer spring inside the buffer tube, prevents them from falling into the receiver, and stabilizes the cycling system. Compatible with AR-15 and AR-10 standards, made of hardened steel, designed for long service life. Keywords: AR-15/AR-10 buffer retainer pin, buffer retainer, MIL-SPEC.

Key benefits

• Secure buffer retention – stable cycling during intensive fire.
• MIL-SPEC compatibility – fits most receivers and buffer tubes.
• Hardened tool steel – increased wear resistance and service life.
• Easy installation – drop-in replacement, standard mounting dimensions.

Purpose

The pin holds the buffer and buffer spring in the correct position inside the buffer tube, prevents free movement into the receiver, and reduces the risk of cycling malfunctions.

Compatibility

• Platforms: AR-15, AR-10.
• Standards: MIL-SPEC buffer tube and receiver.
• Replaces the stock pin without modification.

Materials and finish

• Material: hardened tool steel.
• Finish: anti-corrosion treatment.
• Geometry: conforms to the MIL-SPEC profile of the pin and shoulder.

Package contents

• Buffer retainer pin – 1 pc.

Specifications

• Product type: Buffer Retainer Pin.
• Platform: AR-15/AR-10.
• Purpose: retaining the buffer and buffer spring in the buffer tube.
• Installation: no special tools required, standard procedure.

FAQ

Is it compatible with a commercial buffer tube?

Yes, provided the receiver and tube conform to the MIL-SPEC geometry of the pin seat.

Do I need threadlocker?

No, the pin is held by its spring and the lip of the buffer tube. Threadlockers are not used.

Can I use it on AR-9/PCC?

Yes, if the lower/receiver and buffer tube follow AR-15 dimensions.