Rings, Mounts & BasesAtlas Metal PartsSold by Brownells

Atlas Metal Parts

Picatinny Base Stock - 5.7'''' Picatinny Base Stock

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

6-inch Aluminum

Stock for creating custom accessory

Wide, Flat

Base supports unique mounting applications

Precision Machined

Cross slots accept Picatinny-spec sights,

Compatible Picatinny

Picatinny and separate Weaver-style rings

6061 Aluminum

Black anodized finish

$34.49
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SKU: 100000682

Overview

This aluminum base is intended for building a custom mounting platform when a standard setup does not fit the job. Its precision-machined cross slots are designed to accept Picatinny-spec optical sights, night vision devices, and compatible rings for scope mounting, making it useful for tactical and sporting applications alike. The wide, flat profile provides a practical foundation for tailoring accessory placement to a specific firearm or setup. Finished in black anodizing, it offers a straightforward, purpose-built option for hunters and shooters who need flexibility in how they configure their optics and accessories.

Why Hunters Choose the Atlas Metal Parts

6061 Aluminum

Black anodized finish

Wide, Flat

Base supports custom mounting applications

Precision Machined

Cross slots for Picatinny-spec accessories

Accepts Picatinny

Weaver-style rings for scope mounting

Compact 5.7-inch

Length for versatile base setups

Key Features

  • 6-inch aluminum stock for creating custom accessory and optics mounts
  • Wide, flat base supports unique mounting applications
  • Precision machined cross slots accept Picatinny-spec sights, night vision devices, and accessories
  • Compatible with Picatinny and separate Weaver-style rings for scope mounting
  • 6061 aluminum construction with black anodized finish
  • 5.7-inch length, 1-inch width, and 5/8-inch height base

Best Used For

  • Hunters building custom accessory mounts for rifles with Picatinny-compatible hardware
  • Users needing a flat aluminum base for tailored optics or night vision setups
  • Sporting shooters fitting Picatinny or Weaver-style rings to a custom platform
  • Field users who want a compact 5.7-inch base for application-specific mounting

Specifications

Base Typewide, flat base
Blade Finishblack anodized
Compatible WithPicatinny-spec optical sights, night vision devices, Picatinny rings, Weaver-style rings
Height5/8" (16mm)
Length5.7" (14.2cm)
Material6061 aluminum
Slot Spacing.394" (10mm)
Width1" (2.5cm)

Pros

  • 6061 aluminum construction with black anodized finish
  • Wide, flat base supports custom mounting applications
  • Precision machined cross slots for Picatinny-spec accessories
  • Accepts Picatinny and Weaver-style rings for scope mounting
  • Compact 5.7-inch length for versatile base setups
  • Suitable for optical sights, night vision devices, and other accessories

Considerations & Trade-offs

  • Designed as a base stock for custom mounting, so it requires your own application-specific setup rather than offering a finished, ready-to-use mount.
  • The 5.7-inch length and 1-inch width provide a compact footprint, which may limit how much mounting space is available for larger or multiple accessories.
  • It is specified as 6061 aluminum with a black anodized finish, so fit and finish will depend on the installation and the surrounding hardware used.
  • The 10mm slot spacing is fixed to the listed specification, so accessory placement is constrained by that pattern.

Suggested Comparisons

  • Picatinny rail base
  • Scope mounting rail
  • Optics mounting platform
  • Accessory mounting base

Suggested Accessories

  • Picatinny rings
  • Optics mount
  • Night vision device mount
  • Scope mounting accessories

Frequently Asked Questions

What is this Picatinny base stock intended for?

It is designed to help create custom accessory and optics bases for tactical and sporting applications.

What accessories can it accept?

The precision machined cross slots accept Picatinny-spec optical sights, night vision devices, and other accessories, plus Picatinny and separate Weaver-style rings for scope mounting.

What are the listed material and finish details?

The provided specifications list 6061 aluminum with a black anodized finish.

What are the listed dimensions?

The base stock is listed as 5.7 inches long, 1 inch wide, and 5/8 inch high, with .394 inch (10 mm) slot spacing.

Is this a complete mount or a base for custom work?

It is a six-inch-long aluminum stock with a wide, flat base meant for creating unique mounts to fit different applications, so it is a base for custom work rather than a finished, application-specific mount.