The Weaver Mounts 48428 Top Mount Base 40A in Matte Black is a one-piece aluminum scope base designed for precise and secure mounting on compatible rifle actions such as BSA, Colt, and Remington Bolt Action rifles chambered in .22 caliber.
This top mount base is machined to tight tolerances to ensure a custom fit for maximum strength and stability when mounting rings. Its durable aluminum construction provides a rigid platform, while the cross-lock design helps keep mounting rings firmly seated and resists shifting during use.
Upgrade your rifle’s optics mounting system with this high-quality Weaver top mount base, offering solid alignment and strength for reliable scope installation.
| Weight | 0.0300 lbs |
|---|---|
| Dimensions | 6.80 × 3.30 × 0.40 in |
| Brand | |
| MPN | 48428 |
| FireArm | No |
| Misc | N/A |
| Style | Weaver |
| Model | Top Mount Base |
| Material | Aluminum |
| Finish | Black Matte |
| Gun Type | Rifle |
| Pieces | 1 |
| Mount Type | To Receiver |
| Rings Included | No |
| UPC | 076683484284 |
| Weight | 0.0300 lbs |
|---|---|
| Dimensions | 6.80 × 3.30 × 0.40 in |
| Brand | |
| MPN | 48428 |
| FireArm | No |
| Misc | N/A |
| Style | Weaver |
| Model | Top Mount Base |
| Material | Aluminum |
| Finish | Black Matte |
| Gun Type | Rifle |
| Pieces | 1 |
| Mount Type | To Receiver |
| Rings Included | No |
| UPC | 076683484284 |












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