Leupold STD RVR two-piece bases for Winchester 70 matte black

Leupold STD RVR two-piece bases for Winchester 70 matte black

The Leupold two-piece STD RVR bases are the interface between the Winchester 70 receiver and the rings that hold the riflescope: they define the position, height, and alignment of the optic, upon which zero retention under recoil and proper eye relief depend. The two-piece solution leaves the ejection port clear and reduces weight and bulk compared to a continuous rail. The matte black finish limits reflections and is consistent with matte blued or treated firearms.

In the Standard system, the front ring rests on a dovetail mount that rotates into place, while the rear ring is held by two opposing windage screws. During bore sighting, the windage screws allow for lateral centering of the optic without consuming the scope's internal adjustment range, which thus remains available for fine-tuning; for larger vertical corrections, Leupold provides for the use of shims, leaving the elevation turret free for ballistic compensation. The construction is steel, and the manufacturer recommends the STD system for standard calibers up to the .300 Win. Mag. The stated torque settings are 22 in-lb for the base-to-receiver screws and 45 in-lb for the windage screws.

Key features

• Leupold STD mounting system
• Configuration: two-piece
• Reversible (RVR) rear base: can be oriented in two positions to vary the spacing between rings
• Material: steel
• Finish: matte black
• Windage adjustment on the rear base via opposing screws
• Leupold torque settings: 22 in-lb base/receiver screws, 45 in-lb windage screws
• Rings required: Leupold STD rings
• Leupold part number: 50021

Recommended use

Leupold indicates this part number for the following firearms:

• Winchester 70, 670, 770, and 70A, long action and short action

The setup is completed with Leupold STD rings, available for 1-inch and 30 mm tubes in low, medium, high, and super high heights: the height should be chosen based on the scope objective diameter and barrel clearance.

Package contents

• 2 mounting bases, front and rear
• Receiver mounting screws

Rings and riflescope are not included: the system requires Leupold STD rings, to be ordered separately in the correct diameter and height.

Manufacturer part number: 50021