Weaver #401 Top Mount 1 Piece Base - Gloss Finish
$15.19
$17.45
(You save
$2.26
)
- Type:
- Base - One Piece
- Firearm Make Fit:
- Smith & Wesson
- Finish-Color:
- Black - Gloss
- Misc:
- N/A
- Mount Type:
- To Receiver
- Pieces:
- 1
- Model:
- Top Mount Base
- Material:
- Aluminum
- Rings Included:
- No
The Weaver #401 Top Mount 1 Piece Base is a straightforward, no-fuss scope mounting solution built for rifle shooters who want a solid foundation without complexity. This single-piece aluminum base features a gloss finish and mounts directly to the top of your receiver, offering the simplicity and durability that Weaver has been known for since day one. If you're setting up a hunting rifle, range gun, or any centerfire that runs Weaver rings, this base gets the job done—no gunsmithing, no headaches.
One of the biggest advantages of a one-piece base is rigidity. Because everything is machined from a single chunk of aluminum, there's no flex or tolerance stack-up between two separate pieces. That means your scope stays put from the bench to the field. The #401 is designed to accept standard Weaver rings, which are among the most widely available and affordable rings on the market—making this a budget-conscious path to a repeatable setup.
Installation is straightforward: the base comes with custom-fit screws that fasten securely to your firearm's receiver. Unlike some mounts that demand bedding work or require you to chase threads, the Weaver #401 uses its own hardware to create a solid, permanent connection. The gloss black finish is classic and functional, resisting corrosion without the fuss of polymer coatings.
Weaver has offered both side-mount and top-mount bases in one- and two-piece configurations for decades because shooters have different needs. The #401 top-mount, single-piece design is the right choice if you want straightforward installation, reliable clamping force, and a time-tested standard that works with millions of rings already in circulation.
Key Features
- Single-piece machined aluminum construction for maximum rigidity
- Top-mount design for direct receiver attachment
- Gloss black finish
- Accepts standard Weaver rings
- Includes custom-fit mounting screws
- No gunsmithing or receiver modifications required
Specifications
| Manufacturer | Weaver |
| Model | #401 |
| Mount Type | Top Mount, 1 Piece |
| Material | Aluminum |
| Finish | Gloss Black |
| Ring Compatibility | Weaver Rings |
Frequently Asked Questions
What rings work with the Weaver #401 base?
The #401 is designed to accept standard Weaver rings, which are widely available from most optics retailers and manufacturers. Weaver rings are a common standard, so you have many options when it's time to pair your base with rings.
Will I need to have my rifle gunsmithed to install this base?
No. The Weaver #401 mounts directly to your firearm's receiver and comes with custom-fit screws for secure attachment. No modifications to the receiver are necessary.
What is the difference between a one-piece and two-piece Weaver base?
A one-piece base is machined from a single block of aluminum, creating a rigid, unified mounting surface with no moving parts between two halves. A two-piece base consists of two separate components. One-piece bases generally offer superior rigidity, while two-piece options can provide flexibility for certain gun models or mounting preferences.
Is the gloss finish on the #401 prone to rust?
The aluminum construction is inherently corrosion-resistant. The gloss black finish provides additional protection and a classic appearance, suitable for hunting and range use in most conditions.
