AR-15/AR-10 Buffer Retainer Kit – pin and spring

The buffer retainer kit for AR-15/AR-10 keeps the buffer and buffer spring correctly seated inside the buffer tube, prevents intrusion into the receiver and stabilizes cycling.

What is included

• AR-15/AR-10 buffer retainer pin – 1 pc
• Buffer retainer spring – 1 pc

Key benefits

• Stable cycling – secure retention of the buffer and spring under sustained fire.
• MIL-SPEC compatibility – fits most AR receivers and buffer tubes.
• Hardened tool steel and heat-treated spring steel – durability, corrosion resistance and long service life.
• Quick drop-in install – standard mounting dimensions, no special tools required.

Compatibility

• Platforms: AR-15, AR-10, PCC that follow AR-15 geometry.
• Standards: MIL-SPEC buffer tube and receiver.

Materials and finish

• Pin: hardened tool steel, anti-corrosion finish.
• Spring: heat-treated spring steel with stable elasticity.

Installation and service in Kharkiv

We provide professional installation at our workshop: Kharkiv, 27 Bohdana Khmelnytskoho St (Saint Hubert Gunsmith). We verify MIL-SPEC fit, clean the seat and set correct spring preload.

Specifications

• Type: Buffer Retainer Kit (pin + spring).
• Purpose: retain the buffer and buffer spring in the buffer tube.
• Installation: drop-in, no special tools.

FAQ

Will the kit work with a commercial buffer tube

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

Do I need lubrication

A light coat of gun oil for corrosion protection is sufficient. Continuous lubrication is not required.

Is it PCC compatible

Yes, if your lower and buffer tube use AR-15 dimensions.