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Q&A

Questions & Answers

FAQ

What is the purpose of the 20-MOA slope on the Mark 4 One-Piece Base?

The 20-MOA slope on the Mark 4 One-Piece Base is designed to optimize long-range shooting. It allows for a greater elevation adjustment range on your scope, which is particularly useful when shooting at extended distances.

What is the significance of the 8-40 adaptable design?

The 8-40 adaptable design of the Mark 4 One-Piece Base enhances its versatility. It means the base can be adjusted to fit a wide range of firearms and calibers, allowing you to customize your setup according to your specific shooting needs.

Is the Mark 4 One-Piece Base suitable for both hunting and tactical use?

Yes, the Mark 4 One-Piece Base is designed for dual use. Its robust construction and design ensure outstanding accuracy and performance, making it suitable for both hunting and tactical environments.

What material is the Mark 4 One-Piece Base made from?

The Mark 4 One-Piece Base is crafted from high-quality, durable materials. It also features a matte black finish that is resistant to scratches and wear, ensuring it maintains a professional appearance even under rigorous use.

Does the Mark 4 One-Piece Base fit all models of Browning A-Bolt rifles?

The Mark 4 One-Piece Base is specifically designed for the Browning A-Bolt Short-Action Rifle. However, its 8-40 adaptable design allows it to be compatible with a variety of firearms and calibers.

Reviews about this item

Review Summary

2026-02-26T19:00:00

Rated 5 out of 5

Perfect fit

Perfect fit

Richard T.

2026-02-15T19:00:00

Rated 5 out of 5

Great picatinny rail for remington

Great picatinny rail for remington SA

Alvino G.

2026-02-13T19:00:00

Rated 5 out of 5

Spot on; establishes multiple scope

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

Rated 5 out of 5

Never been disappointed in anything

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

Rated 5 out of 5

This mount is fantastic. solid,

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

Rated 5 out of 5

Mounts fit great

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

Rated 5 out of 5

It's a beautiful thing works

It's a beautiful thing works great

Randy P.

2025-11-30T19:00:00

Rated 5 out of 5

Easy clean fit

Easy clean fit

Justin C.

2025-11-29T19:00:00

Rated 5 out of 5

Perfect fit!

Perfect fit!

Grant B.

2025-11-25T19:00:00

Rated 5 out of 5

Nice fit

Nice fit

DEAN S.

2025-11-22T19:00:00

Rated 5 out of 5

Works great

Works great

Jeremy O.

2025-11-15T19:00:00

Rated 5 out of 5

Seems to be working great

Seems to be working great for my 300 win mag.

Edward J.

2025-11-12T19:00:00

Rated 5 out of 5

The best

The best

Billy W.

2025-11-09T19:00:00

Rated 5 out of 5

Good fit

Good fit

Kenneth S.

2025-10-13T20:00:00

Rated 5 out of 5

Looks slick, tuff as nails

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

Rated 5 out of 5

they worked perfect

they worked perfect

scott s.

2025-10-03T20:00:00

Rated 5 out of 5

Easily installation. All screws /holes

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

Rated 5 out of 5

Great product. Easily installed and

Great product. Easily installed and love the look.

George C.

2025-09-22T20:00:00

Rated 5 out of 5

Fits perfectly and is a

Fits perfectly and is a solid mount!!

Matthew R.

2025-08-31T20:00:00

Rated 5 out of 5

Rock Solid. American made quality

Rock Solid. American made quality I've come to expect from Leupold.

Nick W.

2025-08-29T20:00:00

Rated 5 out of 5

Leupold is probably the best

Leupold is probably the best for any amount of money.

wesley g.

2025-08-25T20:00:00

Rated 5 out of 5

It is fantastic and looks

It is fantastic and looks great with my lepold rings and my vx6HD Gen2

Steven E.

2025-08-20T20:00:00

Rated 5 out of 5

Great product and did exactly

Great product and did exactly what I needed.

Dustin B.

2025-08-14T20:00:00

Rated 5 out of 5

Very satisfied, always have been

Very satisfied, always have been with Leupold, great products, great service.

Todd M.

2025-08-08T20:00:00

Rated 5 out of 5

Fit perfectly

Fit perfectly

Stephen T.

2025-08-01T20:00:00

Rated 5 out of 5

Perfect fit

Perfect fit

Bryan R.

2025-07-23T20:00:00

Rated 5 out of 5

Fit great!

Fit great!

Corey H.

2025-07-22T20:00:00

Rated 5 out of 5

I haven't had any time

I haven't had any time to do any shooting yet

Ross G.

2025-07-08T20:00:00

Rated 4 out of 5

Bert happy

Bert happy

Michael R.

2025-07-06T20:00:00

Rated 5 out of 5

exactly what I wanted

exactly what I wanted

kenny s.

Select a plan in the Add Protection section above and purchase with this product by clicking “Add to Cart”.

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TRUSTED PROTECTION PLANS, EXCEPTIONAL SERVICE.

Invest In Your Gear and Peace Of Mind!

Accidents happen where life happens. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failure, and more.

Repair or Replacement

Repair or Replacement

If we can’t fix it, we’ll replace it at no additional cost.

Accidental Damage

Accidental Damage

Protect your product from drops, spills, and more.

Peace of Mind

Peace of Mind

Enjoy your gear without fear. We have you covered!

Malfunction Protection

Malfunction Protection

When regular use of your product over time results in mechanical or electrical failure.

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We will never charge you a deductible after the purchase of a plan.

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Customer-Focused Support

Our claims process is simple & easy and our customer service team is happy to help.

Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for purchase Internationally or in U.S. Territories.

Leupold Base Specifications

  • Compatibility

    Browning A-Bolt Short Action Rifle

  • Weight

    4.4 oz (124.74g)

  • UPC Code

    030317010409

1 Accessories for Leupold Mark 4 One-Piece Base for Browning A-Bolt Short-Action Rifle, 20 MOA, 8-40 Adaptable, Matte Black

  • All Accessories (1)
  • Straps & Slings (1)

About Leupold Base

FEATURED REVIEWS

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

Overcome the challenges of long-range shooting with the Mark 4 One-Piece Base, specifically designed for the Browning A-Bolt Short-Action Rifle. This robust and sturdy base features a 20-MOA slope, optimizing your rifle setup for precise long-range applications. The one-piece construction not only ensures a reliable and strong foundation for your optics but also enhances the overall durability of the mount, making it an ideal choice for shooters who demand high-quality, enduring equipment.

Crafted from premium materials, the Mark 4 One-Piece Base boasts a matte black finish that resists scratches and wear, maintaining a professional appearance even under rigorous use. Its 8-40 adaptable design provides versatility, allowing for compatibility with a wide range of firearms and calibers, ensuring that you can tailor your setup to your specific shooting needs.

The dual-use nature of this base is a testament to its exceptional design, as it seamlessly transitions between hunting and tactical environments. The legendary ruggedness and absolute waterproof integrity of Leupold optics are mirrored in this base, offering outstanding accuracy and steadfast performance in any condition.

Whether you're a seasoned marksman or a dedicated hunter, the Mark 4 One-Piece Base for the Browning A-Bolt Short-Action Rifle, with its 20 MOA incline, is engineered to enhance your shooting accuracy and elevate your experience. Its reliable, high-quality construction makes it a superior choice for those who value strength and adaptability in their shooting equipment.

Leupold Base Features

  • Durable one-piece base designed for Browning A-Bolt Short-Action Rifle
  • Features a 20-MOA slope for optimized long-range shooting
  • Premium matte black finish for scratch and wear resistance
  • 8-40 adaptable design for compatibility with various firearms and calibers
  • Dual-use base suitable for both hunting and tactical environments
  • Ensures outstanding accuracy with its robust construction and design

Warranty Information

This product has a limited lifetime warranty.

Key Features

  • Achieve solid scope mounting on your Browning A-Bolt with this Leupold Mark 4 base.
  • Ensure precise alignment with this one-piece base, adaptable for 8-40 screws.
  • Enjoy a durable build with this matte black Leupold base, made to last a lifetime.
  • Experience lightweight design at only 4.4 oz, adding minimal weight to your rifle.
  • Get 20 MOA for extended range shooting; a great riflescope base for A-Bolt rifles.
  • Enjoy easy installation; this Leupold scope base gets you shooting quickly.

What's in the box:

  • Leupold Mark 4 One-Piece Base
  • Leupold Lifetime Limited Warranty