Weaver #42 Top Mount Base Gloss Finish - Precision Optics Accessory

The Weaver #42 Top Mount Base Gloss Finish is a lightweight aluminum scope base engineered for shooters who need a reliable foundation for precision optics. Whether you're mounting a rifle scope on a modern hunting rifle, a shotgun, or even a long-range handgun, this top mount base delivers the solid, repeatable connection that separates a shooter who holds zero from one who doesn't. Built from aluminum and finished in gloss, the #42 combines durability with a clean look that works on practically any rifle platform—legacy or current production.

Top mount bases sit directly on the receiver and offer a straightforward installation path for most shooters and gunsmiths. The #42 is sold individually, so you'll need both a front and rear base to complete your setup. Weaver's long history in the mounting business means these bases are engineered to tight tolerances and proven in the field across dozens of rifle and shotgun models.

If you're upgrading optics or building a new rifle, make sure you're ordering the correct base for your specific gun model. Weaver offers a detailed lineup—the #42 is one piece in their full range of bases numbered from #68 through #604—so taking a moment to verify compatibility before checkout will save you frustration and returns. Once you've confirmed fit, the #42 will give you the repeatable mounting platform your scope deserves.

Key Features

• Lightweight aluminum construction for minimal weight addition
• Gloss finish resists corrosion and maintains a professional appearance
• Fits a wide range of rifle, shotgun, and long-range handgun platforms
• Top mount design for straightforward installation
• Sold individually—order front and rear bases as needed

Specifications

Frequently Asked Questions

Do I need to order both front and rear bases separately?

Yes. The Weaver #42 is sold individually, so you'll need to purchase both a front and rear base to complete your scope mounting setup.

What firearms does the Weaver #42 fit?

The #42 is compatible with a wide range of modern and older rifles, shotguns, and long-range handguns. Confirm your specific gun model before ordering to ensure proper fit and function.

Can I find the right base for my rifle model?

Weaver offers bases numbered #68 through #604 across their product line, each engineered for different firearms. Verify your gun model's compatible base number to ensure you're ordering the correct mount.