Williams Gun Sight Rifle Adjustable Fiber Optic 5/16'' Wgos Rear Sight Green

The Williams Gun Sight Rifle Adjustable Fiber Optic 5/16" WGOS rear sight brings fast, reliable aiming to rifles that can accept standard Williams adjustable sight bases. Built around a proven U-notch design, this rear sight uses dual green fiber optic dots to deliver the classic 3-dot sight picture with outstanding contrast in variable light. Whether you're hunting in dawn timber, shooting steel at the range, or working in overcast conditions, the bright fiber optic rods gather available light and give you a sharp, quick-acquisition sight picture without batteries or electronics.

This is a direct drop-in for most modern rifles—no drilling, tapping, or gunsmithing required if your gun already wears a standard Williams adjustable rear sight base. The blade houses a single U-shaped green fiber optic rod that pairs with your existing factory front sight or an optional Williams fiber optic front bead to complete the 2-dot aiming reference. The 5/16" dovetail dimensions match the WGOS specification, so verify your rifle's existing sight base before ordering. If you're converting from traditional steel irons to brighter, faster-tracking sights, this upgrade preserves your rifle's ergonomics and doesn't add bulk.

Williams Gun Sight has been refining aperture and open-sight designs since 1914, and this fiber optic rear leverages that heritage: it's durable aluminum construction designed to handle field use and recoil. The adjustable base lets you dial windage and elevation once zeroed, so you stay on target from the bench or in the field.

Key Features

• Dual green fiber optic dots in 3-dot sight picture pattern for fast, high-contrast acquisition
• U-notch rear sight design proven for speed and accuracy
• Aluminum construction rated for hunting and range use
• Fits standard Williams adjustable rear sight bases (no drilling required on compatible rifles)
• Works with factory front sights or optional Williams fiber optic front beads
• Adjustable windage and elevation on compatible bases

Specifications

Dovetail Size	5/16"
Sight Type	Adjustable rear sight, U-notch
Fiber Optic Configuration	Dual green dots (rear), single U-shaped rod (blade)
Material	Aluminum blade
Aiming Pattern	3-dot (two rear green dots + front sight)
Base Compatibility	Standard Williams adjustable rear guide bases

Frequently Asked Questions

Will this sight fit my rifle without modification?

This sight fits directly into standard Williams adjustable rear sight bases found on many modern rifles—no drilling or tapping needed. However, dovetailed front and rear sights may require minor fitting. Check that your rifle has a compatible Williams rear base before purchasing. If you're unsure, measure your existing sight's dovetail or contact the manufacturer.

What front sight should I use with this rear sight?

You can use your rifle's existing factory front sight or pair it with a Williams fiber optic front bead (sold separately) to complete the full fiber optic sight set. Either way, you'll get the bright, high-contrast aiming reference the fiber optic rear provides.

How bright are the green fiber optic dots?

The green fiber optic rods gather ambient light to create a bright, visible sight picture in low-light conditions—dawn, dusk, overcast, and indoor range shooting. They require no battery or electronic power; the glow comes from the quality of the fiber and available light in your shooting environment.

Can I adjust windage and elevation after installation?

Yes, this rear sight is adjustable on compatible Williams rear bases, so you can dial in windage and elevation once you've zeroed your rifle.