Image unavailable
Weaver Detachable Top-Mount Extension Scope Base #402 Black Matte, 48429
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$9.99
View on Fin Feather Fur Outfitters
You'll be taken to Fin Feather Fur Outfitters to complete your purchase.
Hunter's Outpost earns a commission from affiliate links at no extra cost to you.
SKU: 48429-076683484291
Overview
This top-mount extension base is built for hunters and shooters who need a secure scope mounting option on a wide range of compatible rifles and related firearms. Its tight machining and square-cut notch are intended to work with Weaver detachable rings, helping the base lock in place as part of a recoil-conscious setup. The black matte finish keeps the look subdued, which suits field rifles and practical hunting builds. Fit is model-specific, so it is best suited to owners confirming compatibility before purchase.
Why Hunters Choose the Weaver
Machined Tight
Tolerances for a custom fit
Square-cut Notch
Weaver detachable ring cross bolts
Built Help
Address recoil effects in scope
Top-mount Extension
Design supports Weaver detachable ring
Compatible Wide
A wide range of rifles,
Key Features
- Machined to tight tolerances for a custom fit.
- Square-cut notch is designed to mate with Weaver detachable ring cross bolts.
- Top-mount extension scope base in black matte finish.
- Fits Cooey 71 and Enfield rifles cut like Winchester 70.
- Compatible with select H and R, Marlin, Mauser, Savage, Parker-Hale, and Sears models.
- Designed for use with Weaver detachable rings.
Best Used For
- Hunters mounting optics on compatible older rifles and shotguns listed in the fitment notes.
- Shooters wanting a Weaver detachable ring setup with a base matched to the cross bolt design.
- Owners replacing or adding a scope base on classic hunting rifles before heading to the range.
- Users needing a low-cost mounting option for specific Cooey, Marlin, Savage, or Mauser models.
Specifications
| Base Type | Detachable Top-Mount Extension Scope Base |
|---|---|
| Blade Finish | Black Matte |
| Designed For Recoil Resistance | Yes |
| Fits | Cooey 71; Einfield (cut like Winchester 70); H and R Models 300, 301, 330, and 370 before 1973; 300, 301 LA Post 1973 (270, 30-06, 7mm, 300 Winchester); Herters J9; High-Standard High-Power; Interarms Viscount; Marlin Models 455 and MR7; Mauser Model 98FN; Swedish 96; Bauer 3000 and 4000; Musgrave Models Mark I-IV; Navy Arms Country Boy Muzzle Loader; Parker-Hale Models 1000, 1000C, 1100, 1200, and 1700; Savage Models 10, 12, 16, 510, 512, and 516 Short Action Rifle, 110 (E and S), 111, 112 (R, V, and FV), 116 FSS (Long Actions); 210 Shotgun (use X-high rings); Striker Pistol; Schultz and Larsen; Sears Models 50, 51, 51L, and 53 |
| Machined To Tight Tolerances | Yes |
| Model Number | 48429 |
| Square Cut Notch | Yes |
Pros
- Machined to tight tolerances for a custom fit on listed compatible firearms.
- Square-cut notch is designed to mate with Weaver detachable ring cross bolts.
- Built to help address recoil effects in scope mounting applications.
- Top-mount extension design supports Weaver detachable ring setups.
- Compatible with a wide range of rifles, shotguns, and pistols listed by the manufacturer.
Considerations & Trade-offs
- Compatibility is limited to the specific rifle and shotgun models listed, so fit should be verified carefully before purchase.
- This is a top-mount extension base, which may suit certain setups better than others depending on ring height and scope placement needs.
- The product information does not include installation hardware or setup details, so mounting requirements should be confirmed separately.
- Model coverage spans multiple actions and eras, which makes the fit list useful but also more exacting to match correctly.
Suggested Comparisons
- Scope bases for compatible rifles and firearms
- Detachable scope ring systems
- Fixed scope mounting bases
Suggested Accessories
- Scope rings
- Scope caps
- Bore sighting tool
- Gun cleaning kit
Frequently Asked Questions
What rifles and firearms does this Weaver base fit?
The listed fitment includes Cooey 71; Enfield (cut like Winchester 70); H and R Models 300, 301, 330, and 370 before 1973; H and R 300 and 301 LA Post 1973 in .270, .30-06, 7mm, and .300 Winchester; Herters J9; High-Standard High-Power; Interarms Viscount; Marlin Models 455 and MR7; Mauser Model 98FN; Swedish 96; Bauer 3000 and 4000; Musgrave Models Mark I-IV; Navy Arms Country Boy Muzzle Loader; Parker-Hale Models 1000, 1000C, 1100, 1200, and 1700; Savage Models 10, 12, 16, 510, 512, and 516 Short Action Rifle, 110 (E and S), 111, 112 (R, V, and FV), 116 FSS (Long Actions), 210 Shotgun, and Striker Pistol; Schultz and Larsen; and Sears Models 50, 51, 51L, and 53.
Is this a top-mount scope base?
Yes. The product is identified as a Weaver Detachable Top-Mount Extension Scope Base #402.
How does this base help with recoil?
According to the product description, it is designed to fight the effects of recoil with a square-cut notch that precisely mates to the sturdy cross bolt in every Weaver detachable ring.
What finish does this scope base have?
The title lists it as Black Matte.
Do I need special rings for the Savage 210 shotgun fitment?
The description notes that for the Savage 210 Shotgun, you should use X-high rings.