Rings, Mounts & BasesAmerican Defense ManufacturingSold by Brownells

American Defense Manufacturing

Acog/Modular Bases - Acog Mount 4x Power

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Modular Base

Designed to accept several different

Standalone Use

Is ideal for 1.5x-3x Power

Large Base

Supports full-sized 3x Power ACOG

Also Fits

Similar ACOG-style bases, including the

Overall Length

Of the base is 3.5

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SKU: 100017100

Overview

Built for mounting ACOG-style optics, this modular base gives hunters and shooters a flexible foundation for setups that may need different riser options. In standalone use, it is intended for full-sized 3x Power ACOG scopes, and it also fits similar ACOG-style bases such as the Burris AR-332. The modular design allows it to be adapted for a range of optic configurations rather than locked into a single setup. For users who want a straightforward mount with room to configure around their optic choice, it offers a practical, purpose-specific option.

Why Hunters Choose the American Defense Manufacturing

Modular Base

Accepts several different risers for

Standalone Use

Full-sized 3x Power ACOG scopes

Also Fits

Similar ACOG-style bases, including Burris

Part American

Defense Manufacturing’s modular lineup for

Overall Base

Length is listed at 3.5

Key Features

  • Modular base designed to accept several different risers for varied optic setups.
  • Standalone use is ideal for 1.5x-3x Power Mini ACOG scopes, including TA33 and TA44.
  • Large base supports full-sized 3x Power ACOG scopes such as TA01, TA11, and TA31.
  • Also fits scopes with similar ACOG-style bases, including the Burris AR-332.
  • Overall length of the base is 3.5 inches.
  • Made by American Defense Manufacturing.

Best Used For

  • Hunters mounting full-sized 3x Power ACOG scopes on compatible rifles
  • Users needing a modular base that accepts different risers for varied optics setups
  • Shooters pairing ACOG-style bases with optics such as the Burris AR-332
  • Those building a dedicated setup around TA01, TA11, or TA31 optics

Pros

  • Modular base accepts several different risers for varied optic setups.
  • Designed for standalone use with full-sized 3x Power ACOG scopes.
  • Also fits scopes with similar ACOG-style bases, including Burris AR-332.
  • Part of American Defense Manufacturing’s modular lineup for adaptable mounting.
  • Overall base length is listed at 3.5 inches.

Considerations & Trade-offs

  • The base is intended for 4x power ACOG-style use, so fitment should be checked carefully against the specific optic and base pattern before purchase.
  • It is part of a modular system, which adds flexibility but may require selecting the correct riser for the intended setup.
  • The product description references multiple base sizes in the lineup, so this listing may not be the right standalone choice for every ACOG configuration.
  • The stated overall length appears only for one base in the lineup, so full dimensional details for this specific listing are not fully spelled out in the provided data.

Suggested Comparisons

  • Optic mounting bases
  • Riser mounts for optics
  • ACOG-style scope mounts

Suggested Accessories

  • Optic riser
  • Scope mount
  • Mounting hardware
  • Torque tool

Frequently Asked Questions

Which ACOG scopes does this modular base fit on its own?

The description says the AD-B3 modular base is a standalone mount for full-sized 3x Power ACOG scopes, including the TA01, TA11, and TA31. It also fits scopes with similar ACOG-style bases, such as the Burris AR-332.

Can this base be used with other optics besides the listed ACOGs?

Yes. The AD-B3 is described as accepting several different risers to accommodate a variety of uses, but the source does not list every compatible optic or riser.

What is the overall length of the base?

The source lists the overall length as 3.5, but the unit is not clearly shown in the provided text.

Is this the medium or large modular base in the lineup?

This product text identifies the AD-B3 as the large base in the modular lineup.

Who makes this mount?

The manufacturer listed in the source data is American Defense Manufacturing.