The Weaver #TO22 Top Mount 2 Piece Base is a straightforward solution for shooters who need to adapt a 3/8" grooved receiver to modern scope mounting systems. If you've got a rifle with a grooved receiver and want to mount rings or optics designed for Picatinny or other standard bases, this two-piece base pair converts that older receiver profile to accept contemporary mounting hardware. Built on Weaver's eight decades of optical and mounting expertise, the #TO22 delivers a secure, repeatable platform without unnecessary complexity.

The gloss finish resists glare while maintaining the tool-grade durability expected from a precision rifle base. Installation is straightforward—the two-piece design sits flush atop your receiver, and once properly tightened, it creates a rock-solid interface between your rifle and scope rings. This is the kind of foundational component that doesn't call attention to itself; it just works, cycle after cycle, whether you're zeroing at the bench or hunting in the field.

Weaver bases are favored by shooters who prioritize reliability over trend. The #TO22 specifically appeals to owners of vintage or specialty rifles with grooved receivers who want to avoid permanent modifications while gaining access to the full ecosystem of modern optics and mounting solutions. It's a no-frills upgrade that expands your options without compromise.

Key Features

• Converts 3/8" grooved receiver to accept standard scope mount rings
• Two-piece top-mount design for secure, repeatable fit
• Gloss finish minimizes glare
• Built on Weaver's 80+ years of optical mounting experience
• Enables use of modern scope rings and mounting hardware on classic receivers

Specifications

Manufacturer	Weaver
Model	#TO22
Mount Type	Top Mount, 2 Piece Base
Receiver Compatibility	3/8" Grooved Receiver
Finish	Gloss

Frequently Asked Questions

Will the Weaver #TO22 work on my rifle with a 3/8" grooved receiver?

Yes. The #TO22 is specifically designed to mount atop 3/8" grooved receivers, converting them to accept standard scope mount rings and bases.

What scope rings can I use with this base?

Once installed, the #TO22 allows you to mount Weaver rings and other scope mount systems designed for standard bases. Verify ring compatibility with your specific scope and mounting hardware.

Is installation permanent?

The #TO22 is a non-permanent top-mount solution. It attaches to your receiver without requiring permanent modification to your rifle.

What is included in the package?

You receive the two-piece base system. Scope rings, screws, and tools are sold separately unless otherwise specified in your order.