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Getting glass onto a classic Springfield 1903/A3 has always been one of the trickier parts of running an old military bolt gun, and the Weaver #59 base is the piece that makes it happen. This is a top mount base machined from aluminum in a gloss black finish, cut to tight tolerances so it sits flush and true on the receiver. It serves as the rear base position for the 03-A3, and you'll remove the rear sight to clear room for it to seat properly.
Weaver built this base around their cross-lock design, which is the same system that's held up on hunting rifles for decades. The square-cut notch mates precisely with the cross bolt on Weaver detachable rings, so once everything is torqued down, your rings aren't going anywhere. That tight mechanical lock is what keeps your zero honest round after round, even when the 30-06 starts talking back.
The base comes with its own mounting screws, so you've got the hardware you need to get started right out of the package. Because this is a dedicated rear base for the Springfield 03-A3, it's worth checking Weaver's base chart to confirm your rifle and ring setup before you start drilling or lining things up. Pair it with standard Weaver-style rings and you've got a flexible platform that works with a wide range of scopes.
Made in America and finished in classic black, the #59 is a simple, no-nonsense part that does exactly what a good base should. If you're restoring an 03-A3 for the range or setting one up to hunt, this is the kind of foundation that lets you trust your optic.
The #59 is designed specifically for the Springfield 1903/A3 bolt action rifle. It functions as the rear base, and you'll need to remove the factory rear sight to seat it correctly. Always double check your exact rifle configuration against Weaver's base chart before mounting.
Yes, the base ships with its own mounting screws, so you have the hardware needed to install it. You will still need a set of Weaver-style detachable rings to actually hold your scope, as rings are not included with the base.
This base uses Weaver's cross-lock design, with a square-cut notch that mates to the cross bolt in Weaver detachable rings. Standard Weaver-style rings clamp right onto it, giving you a solid connection that resists recoil and helps the scope hold zero.
It's machined from aluminum and finished in gloss black. Weaver cuts these to tight tolerances for a custom fit, and the design is built to offer strong, stable support for your rings and optic.
| UPC | 076683480590 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 48059 |
| Action | |
| Color | Black |
| Model | |
| Style | Weaver-Style Bases |
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