Why does this Leupold Mark 4 base have a "20 MOA" cant, and what does it mean for my shooting?

The 20 MOA (Minutes of Angle) cant is a forward slope built into the base. This feature is crucial for long-range shooting as it preserves your scope's internal elevation travel, allowing you to dial in adjustments for extreme distances without running out of elevation. It effectively points your scope slightly downwards, giving you more "up" adjustment for distant targets.

What does "8-40 Adaptable" mean for this base, and what screws are included?

"8-40 Adaptable" means this base is designed to accommodate both standard 6-48 receiver screws and larger, heavy-recoil 8-40 tactical screws. Both sets of screws are included with the base, allowing you to choose the appropriate hardware for your Remington 700 Long Action rifle without needing additional modifications. For installation, use 22 in-lbs of torque for 6-48 screws or 28 in-lbs for 8-40 screws.

Is this Leupold Mark 4 base suitable for long-range hunting or precision shooting in Australian conditions?

Yes, this Leupold Mark 4 base is highly suitable for long-range hunting and precision shooting in Australia. Its heavy-duty steel construction and 20 MOA cant make it ideal for custom long-range precision rifle builds, particularly for regional hunting of large game or pest control at distance, as well as for Precision Rifle Series (PRS) competitions. It provides a rock-solid foundation for your optic in demanding bush or outback conditions.

What type of rifle is this Leupold Mark 4 base compatible with, and what kind of scope rings should I use?

This Leupold Mark 4 base (MPN: 170749) is specifically engineered for the Remington 700 Long Action (LA) receiver. It features a 1-piece Picatinny rail design, ensuring maximum compatibility with tactical scope rings. For optimal performance, you should pair it with Picatinny-compatible rings, such as the Leupold QRW2 Quick Release Weaver Style Rings or Leupold Backcountry Rings available in our range.

What material is the Leupold Mark 4 base made from, and how does that contribute to its durability?

The Leupold Mark 4 base is constructed from heavy-duty steel with a matte black finish. This robust material choice ensures exceptional strength, superior recoil resistance, and structural integrity, making it a professional-grade, highly reliable interface designed for maximum stability and a long lifespan even under demanding use.

Does this product require any special Australian electrical certifications like SAA or RCM?

No, this Leupold Mark 4 scope base is a purely mechanical firearm accessory machined from solid steel and does not contain any electrical components. Therefore, standard Australian electrical compliance requirements such as 240V compatibility, SAA approvals, or Regulatory Compliance Mark (RCM) certification are not applicable to this product.

Leupold Mark 4 Scope Base - Leupold LE170749 Rem 700 LA

The Leupold Mark 4 Remington 700 Long Action 1-Piece 20 MOA Base (MPN: 170749, Model: LE170749) is a professional-grade, heavy-duty steel scope base engineered to provide a rock-solid, highly reliable interface between your rifle and optic. Machined from solid steel, this one-piece Picatinny rail is designed specifically for the Remington 700 Long Action receiver. It features a built-in 20 MOA forward slope to preserve your scope's internal elevation travel, making it an essential component for long-range precision. As Leupold has officially designated this specific steel model as discontinued, remaining stock is highly valued by Australian shooters who prefer the rigidity and thermal stability of traditional steel bases over aluminum alternatives.

Key Features:

20 MOA Built-In Cant: Machined with a 20 MOA forward slope that elevates the rear of the optic relative to the muzzle, preserving critical elevation adjustment for extreme-distance shooting.
8-40 Adaptable Design: Features larger through-holes to accommodate heavy-recoil 8-40 tactical screws, while also including modified 6-48 shoulder screws to fit standard factory receivers without modification.
Solid Steel Construction: Offers superior structural integrity and recoil resistance, finished in a durable matte black to match tactical and hunting setups.
Picatinny Cross-Slot Compatibility: Machined to precise tolerances, ensuring maximum compatibility with tactical scope rings and robust recoil management.

Product Specifications:

Manufacturer Part Number (MPN): 170749
Model: LE170749
Material: Steel
Finish: Matte Black
Weight: 5.2 oz (approximately 147.4 grams)
Base Configuration: 1-Piece Picatinny rail
Base Cant: 20 MOA
Compatibility: Remington 700 Long Action (LA) receivers
Torque Specifications (6-48 Screws): 22 in-lbs
Torque Specifications (8-40 Screws): 28 in-lbs
Included Hardware: Both 8-40 screws and modified 6-48 shoulder screws

Who It Is For:

The Leupold Mark 4 170749 base is designed for long-range precision shooters, tactical operators, and regional hunters utilising Remington 700 Long Action platforms chambered in heavy-recoiling calibers like .300 Winchester Magnum, .338 Lapua Magnum, or .30-06 Springfield. It is highly suited for Australian shooters building custom precision rifles for regional pest control, large game hunting, or competing in Precision Rifle Series (PRS) matches where maintaining a precise zero under harsh field conditions is critical. This steel base is ideal for those who demand maximum rigidity and prefer the longevity of steel over lightweight alloy mounts.

SKU	LD38626LP
Model #	LE170749
Brand	Leupold
Shipping Weight	1.0000kg

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Leupold Mark 4 Le170749 Scope Base Remington 700 Long Action 1-Piece 20 Moa Steel

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