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The Williams WGOS base is the medium-size mounting platform in the Williams Guide Open Sight system, cut to fit barrels between .730" and .830" in diameter with a .395" radius. It bolts onto the barrel using standard .5625" center-to-center hole spacing, so there's no need to have the barrel dovetailed to get a proper open sight setup. Everything is milled from high-tensile strength aluminum with a black anodized finish, which means no stampings and nothing that's going to rust on you out in the field.
The real appeal here is the modular design. This is a base only, so it pairs with a separate Williams rear sight blade to build a complete open sight. Once the base is mounted, you can move between different blade styles and heights, or even step up to a fiber optic or peep setup down the road, without pulling the whole thing off the barrel. Windage and elevation adjustments run on dovetailed tracks with hardened gib locks, and you make changes by loosening a single screw. That's about as painless as sight adjustment gets.
This medium base covers a big chunk of common sporting rifle barrel diameters, which is why the WGOS line shows up on everything from lever guns to Winchester and Marlin rifles to muzzleloaders. Since barrel diameters vary, measure yours before ordering to confirm it lands in the .730" to .830" window. Williams has been building sights in Michigan since 1926, and their open sight bases have earned a reputation for being tough, no-fuss, and easy to live with. It's a smart pick whether you're restoring an older rifle with a worn or missing sight or just want a cleaner, more adjustable setup than the factory hardware.
Keep in mind the blade sells separately, so grab the blade style and height that matches your sight picture to finish the build. Williams recommends having sights installed by a qualified gunsmith to get everything squared away right.
No, this is the base only. The WGOS system is modular, so you pick the Williams rear sight blade style and height separately to complete the sight. This lets you tailor the sight picture and swap blades later without removing the base.
This is the medium size with a .395" radius, designed for barrels measuring between .730" and .830" in diameter. Measure your barrel where the base will sit before ordering to confirm it falls in that range. Williams also offers small, large, and extra-large bases for other barrel diameters.
No dovetailing of the barrel is required. The base uses standard .5625" center-to-center mounting holes and secures directly to the barrel. Williams recommends having the installation done by a qualified gunsmith to get it aligned and torqued correctly.
It's milled from high-tensile strength aluminum with a black anodized finish, so it won't rust. All parts are machined rather than stamped, which makes it a durable, low-maintenance choice for a hunting or field rifle.
| UPC | 053506015689 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 001568 |
| Color | Black |
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