The Williams Gun Sight Adjustable Fiber Optic Rear Sight in green, 5/16 in. WGOS (Williams Gun Sight part no. 60219) is a full rear sight assembly built around the Williams Guide Open Sight (WGOS) pattern, one of the most common rear sight dovetail sizes on classic and modern rifles alike. Williams pairs a bright green fiber optic insert with full windage and elevation adjustment, giving hunters a fast-acquiring, tunable sight in a dovetail size that fits a wide range of rifles. It’s a straightforward upgrade for shooters who want more visibility than a plain notch without moving to a scope.

Key Specifications

• Uses the 5/16 in. WGOS (Williams Guide Open Sight) dovetail, a widely compatible rear sight pattern.
• Features a green fiber optic insert for a bright, fast-acquiring aiming reference.
• Offers full windage and elevation adjustment for precise zeroing.
• Installs as a complete standalone sight, with no base or gunsmithing required beyond the dovetail fit.
• The 5/16 in. dovetail fits a wide range of classic and modern rifles sharing that pattern.

Frequently Asked Questions

Is this sight adjustable? Yes, it offers full windage and elevation adjustment.

What dovetail size does this sight use? The 5/16 in. WGOS pattern, a widely compatible rear sight dovetail.

Buy the Williams Gun Sight Adjustable Fiber Optic Rear Sight

Add a bright, fully adjustable fiber optic rear sight to your rifle. Order the Williams Gun Sight WGOS rear sight from our Lubbock, Texas gun shop, part of our gun sights lineup, for fast, insured shipping.