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The BackCountry Cross-Slot One-Piece Base is made from 7075-T6 Aluminum, known for its strength and lightweight properties.
The 20 MOA slope on this base is designed to enhance long-range shooting accuracy by allowing for precise elevation adjustments.
This base is ideally used with Leupold BackCountry Cross-Slot Rings or Mark 4 Aluminum rings for a comprehensive, lightweight, and rugged mounting solution.
This base is specifically designed for the Weatherby Mark 5/Vanguard Long-Action Rifle.
The base has a sleek matte black finish, enhancing the aesthetic appeal of your rifle.
Review Summary
2026-02-26T19:00:00
Perfect fit
Richard T.

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.

Weatherby Mark 5/Vanguard Long Action Rifle
Aluminum
030317011888

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.
Perfect fit
By Richard T.
Perfect fit
If you're a long-range shooting enthusiast, the BackCountry Cross-Slot One-Piece Base for Weatherby Mark 5/Vanguard Long-Action Rifle, 20 MOA, Matte Black is a must-have accessory. Crafted from robust yet lightweight 7075-T6 Aluminum, this Picatinny rail is designed to withstand the rigors of outdoor use while minimizing the weight on your firearm.
The one-piece rail design offers maximum eye relief, providing versatile ring placement options to suit your shooting style. This feature makes it an ideal match for Leupold BackCountry Cross-Slot Rings or Mark 4 Aluminum rings, creating a comprehensive, lightweight, and rugged mounting solution for your rifle.
What sets this product apart is its 20-MOA slope, specifically engineered for long-range shooting applications. This slope allows for precise elevation adjustments, enhancing your shooting accuracy over extended distances.
Finished in a sleek matte black, the BackCountry Cross-Slot One-Piece Base seamlessly integrates with your Weatherby Mark 5/Vanguard Long-Action Rifle, enhancing not only its functionality but also its aesthetic appeal.
In summary, this product offers a blend of durability, lightweight design, and precision, making it an essential addition to your long-range shooting gear.