What is the purpose of the 20 MOA built-in slope on the Leupold Mark 4 scope base?

The 20 MOA (Minutes of Angle) built-in slope is crucial for long-range shooting. It slightly tilts your scope forward, preserving its internal elevation adjustment range. This allows you to dial in targets at extreme distances without running out of vertical adjustment.

Which rifle models are compatible with this Leupold Mark 4 scope base (MPN: 171500)?

This specific Leupold Mark 4 scope base is designed for Weatherby Vanguard Long Action and Weatherby Mark V (9-Lug Magnum) Long Action receivers. It comes with both standard 6-48 and larger 8-40 screws, making it adaptable to different receiver thread sizes.

What material is the Leupold Mark 4 scope base constructed from, and why is that important for accuracy?

This scope base is precision machined from solid steel. This robust construction ensures a rock-solid, high-integrity connection and helps prevent zero shifts by ensuring its thermal expansion matches that of steel rifle receivers, even in varying Australian bush or outback temperatures.

What type of scope rings should I use with this Leupold Mark 4 Picatinny-style base?

You should use Picatinny-compatible scope rings with this base. For optimal performance and a secure fit, consider Leupold's own QRW2 Quick Release Weaver Style Rings or Backcountry Rings, which are designed to integrate seamlessly with Picatinny-style rails.

Are there any special Australian regulations or certifications I need to be aware of for this scope base?

As a purely mechanical firearm accessory, this Leupold Mark 4 scope base has no electrical components, so Australian electrical compatibility (e.g., 240V, SAA/RCM certifications) is not applicable. While scope rails are generally unrestricted across Australian states, it's always wise to verify any specific state-based firearm accessory regulations.

20 MOA Scope Base - Leupold Mark 4 LE171500 Wby LA

The Leupold Mark 4 Weatherby Vanguard/Mark V Long Action (LA) 1-Piece 20 MOA Matte Scope Base (MPN: 171500) is a precision-engineered mounting solution designed to establish a highly secure connection between your rifle receiver and your optic. Engineered specifically for long-range shooting applications, this one-piece Picatinny-style rail provides the structural integrity required to maintain a consistent zero under heavy recoil. Machined from solid steel, it offers thermal expansion properties that match steel receivers, preventing zero shifts caused by temperature fluctuations common in diverse Australian shooting environments, from the cold southern ranges to the hot northern outback.

Key Features:

Built-In 20 MOA Slope: By tilting the optic slightly forward, this base adds 20 Minutes of Angle (MOA) of built-in elevation. This design preserves the internal elevation travel of your scope, allowing you to dial in targets at extreme distances without running out of adjustment range.
Machined Steel Construction: Crafted from high-grade solid steel, this base delivers high durability and structural rigidity, ensuring your mounting system matches the strength of your receiver.
Cross-Slot Picatinny Design: The robust cross-slot layout offers versatility for scope ring placement, accommodating various eye-relief requirements while providing high recoil resistance.
8-40 Adaptable Screws: This package includes both standard 6-48 screws and larger, heavy-duty 8-40 screws, making it adaptable for receivers drilled and tapped for either thread size.
Matte Black Finish: The durable matte black finish minimizes glare and reflection, providing a clean, professional look that integrates with your rifle's aesthetic.

Specifications:

Manufacturer Part Number (MPN): 171500
Rifle Compatibility: Weatherby Vanguard Long Action (LA) and Weatherby Mark V (9-Lug Magnum) Long Action receivers
Base Configuration: 1-Piece Picatinny-style rail
Elevation Cant: 20 MOA (Minutes of Angle)
Material: Precision-machined steel
Finish: Matte Black
Screws Included: Standard 6-48 screws and larger 8-40 screws
Weight: Approximately 0.2 kg shipping weight

Who It Is For:

The Leupold Mark 4 Weatherby Vanguard/Mark V LA 1-Piece 20 MOA Scope Base is designed for dedicated long-range precision shooters, tactical operators, and big-game hunters across Australia. It is ideal for those utilizing Weatherby Vanguard or Mark V magnum long-action rifles who require stability and extended elevation capabilities for extreme-distance targets. Whether you are competing in local precision rifle matches or hunting large game in demanding terrain, this steel base provides the reliability and structural integrity needed to ensure your optical system performs consistently under all conditions.

SKU	LD38636LP
Model #	LE171500
Brand	Leupold
Shipping Weight	1.0000kg

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Leupold Mark 4 Le171500 Weatherby Vanguard Mark V La 1-Piece 20 Moa Matte Scope Base Steel

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