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308 Ar Barrel Extension Torque Tools - Brn Ar-308 Barrel Extrension Torque Tool
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$49.75
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SKU: 080001040
Overview
Built for installing barrel nuts on .308 DPMS pattern uppers, this Brownells tool helps apply straight-line torque while reducing the chance of marring the upper receiver. It is intended to support even torque application and proper alignment of the barrel, upper receiver, and gas tube ports during assembly. The tool works with any barrel nut wrench or free-float tube wrench and a 1/2" square drive torque wrench, and it includes instructions for setup. It fits .308 DPMS pattern uppers and barrel extensions, except the newer G2 versions.
Why Hunters Choose the Brownells
Aids Straight-line
Torque application during barrel nut
Helps Prevent
Scratching the exterior of the
Supports Even
Torque application for proper alignment
Compatible Any
Any barrel nut wrench or
Requires 1/2"
Square drive torque wrench
Key Features
- Aids straight-line torque application during barrel nut installation
- Helps avoid scratching the exterior of the upper receiver
- Supports even torque application and alignment of barrel, receiver, and gas tube ports
- Works with barrel nut wrenches or free-float tube wrenches
- Requires a 1/2" square drive torque wrench
- Fits .308 DPMS pattern uppers and barrel extensions, except new G2 versions
- Includes instructions
Best Used For
- .308 DPMS pattern upper builders needing straight-line barrel nut torque during installation
- Gunsmiths wanting to avoid scratching the upper receiver exterior while tightening barrel nuts
- Users with a bench vise and 1/2-inch square drive torque wrench for controlled assembly
- Builders working on .308 DPMS pattern uppers and barrel extensions, excluding new G2 versions
Specifications
| Blade Finish | Black oxide |
|---|---|
| Diameter | 1.18 in (3 cm) |
| Fit | Fits .308 DPMS pattern uppers/barrel extensions except the new G2 versions |
| Instructions Included | Yes |
| Length | 10 in (25.4 cm) |
| Material | Machined steel |
| Required Torque Wrench Drive | 1/2 in square drive |
Pros
- Aids straight-line torque application during barrel nut installation
- Helps prevent scratching the exterior of the upper receiver
- Supports even torque application for proper alignment
- Compatible with any barrel nut wrench or free-float tube wrench
- Requires a 1/2" square drive torque wrench
- Includes instructions for setup and use
Considerations & Trade-offs
- Requires a 1/2" square-drive torque wrench, so it is not a standalone solution for barrel nut installation.
- Fits .308 DPMS pattern uppers/barrel extensions except the new G2 versions, which narrows compatibility.
- Designed for use with a barrel nut wrench or free-float tube wrench, so setup depends on having the right supporting tools on hand.
- At 10" long, it is a dedicated bench tool rather than a compact field-use accessory.
Suggested Comparisons
- AR-308 barrel nut wrench
- Torque wrench with 1/2" square drive
- Upper receiver vise block
- Free-float tube installation tool
Suggested Accessories
- Torque wrench
- Barrel nut wrench
- Bench vise
- Upper receiver vise block
Frequently Asked Questions
What is this tool used for on a .308 build?
It is used to help apply straight-line torque when installing the barrel nut, while helping avoid scratching the exterior of the upper receiver. The description also says it helps keep the barrel, upper receiver, and gas tube ports properly aligned.
What upper receivers or barrel extensions does it fit?
It fits .308 DPMS pattern uppers and barrel extensions, except for the new G2 versions.
What tools do I need to use it?
It is used with any barrel nut wrench or free-float tube wrench and a torque wrench with a 1/2" square drive.
What are the listed specifications?
The listed specs are machined steel with a black oxide finish. It is 10" long and 1.18" in diameter. Instructions are included.
Who makes this tool?
The manufacturer listed is Brownells.