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The Mark 4 8-40 Adaptable Long Range Base is designed to provide a stable and secure platform for mounting various accessories on your firearm, such as scopes, sights, and lights. It is particularly suited for long-range shooting applications, thanks to its 20-MOA slope.
This base is constructed from high-quality materials that can withstand the rigors of frequent use. It also features a matte finish that offers an extra layer of protection against wear and tear.
Yes, this base is versatile and compatible with a variety of firearms, including the Weatherby Vanguard SA Rifle.
The Mark 4 8-40 Adaptable Long Range Base comes with two sets of mounting screws, already treated with locktite blue for additional security. This ensures a perfect fit and easy installation.
Review Summary
2026-02-15T19:00:00
Great picatinny rail for remington SA
Alvino G.

2026-02-13T19:00:00
Spot on; establishes multiple scope accommodations, enables efficient action engagement of ammo, and efficient action discharge of casings. It's simply one of the biggest no brainers in the history of man kind. Thank you, Leupold.
Ken W.

2026-02-09T19:00:00
Never been disappointed in anything I have used from Leupold and I have been shooting for a long time. Thanks everyone at Leupold
Perry S.

2026-02-08T19:00:00
This mount is fantastic. solid, clean looking and sturdy. This mount completes the package with the best scope on the market! Took a elk and a nice mule deer this year, couldn't be happier!
kevin b.

2026-01-31T19:00:00
Love it fits my browning xbolt 1 great had the right screws easy install this one works other brands do not fit right and it looks sweet
dennis b.

2025-12-21T19:00:00
It's a beautiful thing works great
Randy P.

2025-11-30T19:00:00
Easy clean fit
Justin C.

2025-11-29T19:00:00
Perfect fit!
Grant B.

2025-11-25T19:00:00
Nice fit
DEAN S.

2025-11-22T19:00:00
Works great
Jeremy O.

2025-11-15T19:00:00
Seems to be working great for my 300 win mag.
Edward J.

2025-11-12T19:00:00
The best
Billy W.

2025-11-09T19:00:00
Good fit
Kenneth S.

2025-10-13T20:00:00
Looks slick, tuff as nails and is made with absolute precision! Well done Leupold once again you've exceeded my expectations!
James G.

2025-10-06T20:00:00
they worked perfect
scott s.

2025-10-03T20:00:00
Easily installation. All screws /holes in perfect alignment with the action. All screws that secured the base to the action were perfect in length.
JAY C.

2025-09-28T20:00:00
Great product. Easily installed and love the look.
George C.

2025-09-22T20:00:00
Fits perfectly and is a solid mount!!
Matthew R.

2025-08-31T20:00:00
Rock Solid. American made quality I've come to expect from Leupold.
Nick W.

2025-08-29T20:00:00
Leupold is probably the best for any amount of money.
wesley g.

2025-08-25T20:00:00
It is fantastic and looks great with my lepold rings and my vx6HD Gen2
Steven E.

2025-08-20T20:00:00
Great product and did exactly what I needed.
Dustin B.

2025-08-14T20:00:00
Very satisfied, always have been with Leupold, great products, great service.
Todd M.

2025-08-08T20:00:00
Fit perfectly
Stephen T.

2025-08-01T20:00:00
Perfect fit
Bryan R.

2025-07-23T20:00:00
Fit great!
Corey H.

2025-07-22T20:00:00
I haven't had any time to do any shooting yet
Ross G.

2025-07-08T20:00:00
Bert happy
Michael R.

2025-07-06T20:00:00
exactly what I wanted
kenny s.

2025-07-04T20:00:00
Great product well made it have 3 of them never any issues
Eric B.

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Browse our FAQ
Weatherby Vanguard SA Rifle
Mark 4/Cross-Slot/QRW/PRW Rings
6-48 and 8-40 Screws
Steel
20 MOA Adjustment
4.6 oz (130.41g)
030317012281

Rock solid base as expected
By Rateoftwist
I have used the mark 4 mounts on several rifles, and have never had any problems with the base or rings through many years of service. If you are looking for a solid base for hunting or long range you cannot go wrong with mark 4 bases. I also appreciate the MOA cant for the long range applications.
Great picatinny rail for remington
By Alvino G.
Great picatinny rail for remington SA
When seeking a robust and reliable solution for your long-range shooting needs, consider the Mark 4 8-40 Adaptable Long Range Base for Weatherby Vanguard SA Rifle. This high-quality base is specifically designed to enhance your shooting experience, offering a sturdy platform for mounting various accessories like scopes, sights, and lights.
Constructed with durability in mind, this adaptable long-range base is made from premium materials that can withstand the rigors of frequent use. Its matte finish not only adds a sleek, professional look to your firearm but also provides an extra layer of protection against wear and tear.
One of the standout features of this Mark 4 base is its 20-MOA slope, which is specifically designed for long-range shooting applications. This feature allows for precise adjustments, ensuring optimal performance even in the most challenging shooting scenarios.
Moreover, this versatile base is compatible with a variety of firearms, including the Weatherby Vanguard SA Rifle. This compatibility makes it an excellent choice for shooters who use different firearms for various shooting scenarios.
In addition, the Mark 4 8-40 Adaptable Long Range Base comes with two sets of mounting screws, already treated with locktite blue for added security. This thoughtful inclusion ensures a perfect fit and easy installation, saving you time and effort.
In summary, the Mark 4 8-40 Adaptable Long Range Base for Weatherby Vanguard SA Rifle is a durable, reliable, and versatile accessory that enhances your shooting experience, making it an essential addition to your shooting gear.