Weaver #402 Top Mount Base Silver - Extended Length
- Type:
- Base - Two Piece
- Firearm Make Fit:
- Savage Arms
- Finish-Color:
- Silver
- Misc:
- N/A
- Mount Type:
- To Receiver
- Pieces:
- 1
- Model:
- Top Mount Base
- Material:
- Aluminum
- Rings Included:
- No
The Weaver #402 Top Mount Base in silver finish is a single-piece aluminum scope mount designed to secure your optic directly to the top of your rifle without requiring any firearm modification. Built to Weaver's reputation for reliability, this extended-length base provides a solid platform for mounting Weaver-compatible scope rings and is engineered to deliver a snug, repeatable fit that holds zero through hard use in the field or at the range.
Top-mounted bases like the #402 are the standard choice for most modern hunting rifles and tactical platforms. The extended length design accommodates a wider variety of receiver configurations and can help optimize eye relief and sight picture positioning, especially on rifles where a standard base might sit too far forward or back relative to your preferred shooting position. Silver anodizing offers both durability and a classic aesthetic that matches traditional rifle aesthetics.
Installation is straightforward—the base bolts directly to the existing drilled-and-tapped holes on your rifle's receiver. Because Weaver bases are designed to Weaver specifications (the same standard used by most major ring manufacturers), you'll have broad compatibility when selecting scope rings. Whether you're setting up a long-range hunter, a ranch rifle, or a precision rimfire, a quality one-piece base is the foundation of a reliable scope system.
Key Features
- One-piece aluminum construction for maximum rigidity
- Silver anodized finish
- Extended length design for versatile receiver compatibility
- No firearm modification required
- Weaver standard—compatible with most quality scope rings
Specifications
| Type | Top Mount Base |
| Design | One-Piece |
| Material | Aluminum |
| Finish | Silver |
| Length | Extended |
| Mount Standard | Weaver |
Frequently Asked Questions
Will this base fit my rifle?
The #402 is a Weaver top mount base designed for rifles with standard Weaver-pattern drilled-and-tapped holes on the receiver. Check your rifle's specifications or contact the manufacturer to confirm it has Weaver-compatible mounting holes. The extended length accommodates a wide range of receiver configurations.
What scope rings do I need?
You'll need Weaver-compatible scope rings to pair with this base. Weaver is the industry standard, so most major ring manufacturers (Leupold, Burris, Zeiss, and many others) make rings that will work with Weaver bases.
Do I need to modify my rifle to install this?
No. The base bolts directly to the existing drilled-and-tapped holes on your rifle's receiver without requiring any modification or gunsmithing.
What's the difference between a one-piece and two-piece base?
A one-piece base like the #402 mounts as a single unit for maximum rigidity and is the standard choice for most hunting and tactical rifles. Two-piece bases separate front and rear, which can offer flexibility on some platforms but are less common on modern rifles.

