Rifle ToolsArrington Accuracy WorksSold by Brownells

Arrington Accuracy Works

Ar-15/M16 Colt Law Enforcement Carbine Armorer's Wrench - Barrel Nut Wrench

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

Removing Installing

Proprietary barrel nut on the

Dedicated Heavy-duty

Wrench for Colt LE6940 ALEC

Self-contained Armorer

Wrench includes a 1/2" square

Armorer Wrench

Includes a notch for removing

Compact Barrel

Nut Wrench includes a 1/2"

$109.99
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SKU: 100005371

Overview

Built for work on the Colt LE6940 Advanced Law Enforcement Carbine, this dedicated wrench is intended for removing and installing the proprietary barrel nut without improvising with general-purpose tools. The self-contained armorer version adds a notch for removing the ALEC flash suppressor, while both versions include a 1/2" square cutout for use with a torque wrench or breaker bar. With a heavy-duty steel construction and parkerized matte black finish, it is suited to armorer bench use where the correct interface matters. The design is compact and purpose-specific, so it is useful when servicing this platform but not a substitute for a broader multi-platform wrench.

Why Hunters Choose the Arrington Accuracy Works

Removing Installing

Colt LE6940 proprietary barrel nut

Heavy-duty Wrench

Construction supports dedicated armorer use

Includes 1/2-inch

Square cutout for torque wrench

Armorer Wrench

Version adds a notch for

Compact Barrel

Nut wrench offers a simpler,

Key Features

  • Designed for removing and installing the proprietary barrel nut on the Colt LE6940 Advanced Law Enforcement Carbine
  • Dedicated heavy-duty wrench for Colt LE6940 ALEC maintenance
  • Self-contained Armorer Wrench includes a 1/2" square cutout for a torque wrench or breaker bar
  • Armorer Wrench includes a notch for removing the ALEC flash suppressor
  • Compact Barrel Nut Wrench includes a 1/2" torque driver or breaker bar cutout
  • Steel construction with Parkerized matte black finish

Best Used For

  • Armorers servicing Colt LE6940 carbines requiring barrel nut removal or installation
  • Users needing a dedicated wrench for proprietary Colt LE6940 Advanced Law Enforcement Carbine components
  • Workshops using a torque wrench or breaker bar with a 1/2-inch square cutout
  • Technicians who also need a notch for removing the ALEC flash suppressor
  • Compact tool users wanting a barrel nut wrench without the extra flash suppressor feature

Specifications

Blade FinishParkerized, matte black
Compact VersionHas 1/2" torque driver/breaker bar cutout only
Compatible PlatformColt LE6940 Advanced Law Enforcement Carbine (ALEC)
Compatible UseRemoving/Installing barrel nut
Handle Thickness3/8"
Handle Width1.25" (3.17cm)
MaterialSteel
Notch For Flash Suppressor RemovalYes
Overall Length9" (23cm)
Self Contained VersionIncludes notch for removing the ALEC flash suppressor
Square Cutout1/2"
Tool TypeArmorer Wrench / Barrel Nut Wrench

Pros

  • Designed specifically for removing and installing the Colt LE6940 proprietary barrel nut
  • Heavy-duty wrench construction supports dedicated armorer use
  • Includes a 1/2-inch square cutout for torque wrench or breaker bar use
  • Armorer wrench version adds a notch for removing the ALEC flash suppressor
  • Compact barrel nut wrench offers a simpler, space-saving tool option

Considerations & Trade-offs

  • Designed specifically for the Colt LE6940 proprietary barrel nut, so it is not a general-purpose AR armorer’s wrench.
  • The self-contained armorer wrench includes a flash suppressor notch, while the compact barrel nut wrench does not, so the two versions serve different tasks.
  • At $109.99, it is a specialized tool purchase that makes the most sense for owners or armorers working on this specific platform.
  • The provided specifications list steel with a Parkerized matte black finish, but do not include broader compatibility details beyond the LE6940 application.

Suggested Comparisons

  • AR-15 armorer tools
  • Barrel nut wrenches
  • Flash suppressor removal tools
  • Torque wrench accessories

Suggested Accessories

  • Torque wrench
  • Breaker bar
  • Armorer's mat
  • Gun cleaning kit

Frequently Asked Questions

What is this wrench designed to remove or install?

It is designed for removing and installing the proprietary barrel nut on the Colt LE6940 Advanced Law Enforcement Carbine (ALEC).

Does this wrench work with a torque wrench or breaker bar?

Yes. The self-contained Armorer Wrench includes a 1/2" square cutout for a torque wrench or breaker bar. The Compact Barrel Nut Wrench also includes the 1/2" torque driver/breaker bar cutout.

Does the Armorer Wrench do anything besides barrel nut work?

Yes. The self-contained Armorer Wrench also includes a notch for removing the ALEC flash suppressor.

What are the listed specifications for the wrench?

The listed specs are steel construction with a Parkerized, matte black finish. The Armorer Wrench is listed at 9" overall length and 1.25" handle width.

Is this a general-purpose AR wrench?

The description identifies it as a dedicated wrench for the Colt LE6940 Advanced Law Enforcement Carbine (ALEC) barrel nut, so its use is specific rather than general-purpose.