Optic Mount for Holosun 509T to S&W Revolvers

This optic mount adapts the Holosun 509T footprint to the top strap of S&W K, L, N, and X-Frame revolvers with adjustable rear sights. Machined from billet aluminum with a black hardcoat anodized finish, it replaces the factory rear sight assembly to provide a secure, repeatable mounting platform. The included screws are heat-treated stainless steel, black oxide coated, with a pre-applied hi-temp thread locker patch for consistent retention without additional compounds.

Compatibility

• Smith & Wesson K-Frame revolvers (adjustable rear sight models)
• Smith & Wesson L-Frame revolvers (adjustable rear sight models)
• Smith & Wesson N-Frame revolvers (adjustable rear sight models)
• Smith & Wesson X-Frame revolvers (adjustable rear sight models)
• Accepts optics with Holosun 509T footprint (Holosun 509T, 509T X2, SCALARWORKS, etc.)
• Does NOT fit fixed-sight or non-adjustable rear sight models

Key Features

• Material: 6061 billet aluminum, black hardcoat anodized
• Hardware: Heat-treated stainless steel, black oxide coated, thread-locker pre-applied
• Manufacturing: CNC machined in Peoria, Arizona
• Design: Replaces factory adjustable rear sight assembly
• Weight: Minimal added mass to top strap

Install Difficulty: 2/5

Requires removal of the factory rear sight assembly (drift punch or sight tool may be needed on some models). Standard gunsmithing screwdrivers (hex or Torx, depending on your revolver) and a small amount of blue Loctite (if not using pre-applied patch) are recommended. Estimated time: 15–30 minutes.

FAQ

Will this fit my S&W 686 (L-Frame)?

Yes, if your 686 has an adjustable rear sight. Models with fixed rear sights are not compatible.

Does this mount require any permanent modification to the revolver?

No. The mount replaces the rear sight assembly using existing screw holes. Installation is reversible.

What optic footprints are supported?

This mount is specifically designed for the Holosun 509T footprint (two-post, two-screw pattern). Optics using other footprints (RMR, Shield, Docter, etc.) will not fit without an adapter plate.

Ships within 1–2 business days. This component carries a limited lifetime warranty against manufacturing defects. Return in original packaging within 30 days for refund or exchange.