Uploaded November 2025 | Updated September 2026, 1 week ago
Other videos mentioned here:
-Installing the LAW Folder- youtube.com/watch?v=SenQXacAXuA
-How to Stake a Castle Nut- youtube.com/watch?v=030036jJius
In this Quick Tip, Caleb from Brownells walks through how to properly use the LAW Lower Alignment Tool when assembling an AR-15 lower receiver. This tool is designed to perfectly align your receiver extension (buffer tube) with the lower, improving reliability and simplifying the staking process. Whether you're building your first AR or refining your gunsmithing workflow, the LAW Lower Alignment Tool, paired with the Geissele Reaction Block, makes setup fast, repeatable, and accurate.
Chapters & Timestamps:
00:00 Introduction to the LAW Lower Alignment Tool
00:24 Unboxing and Initial Impressions
00:50 Required Tools: Geissele Reaction Block
01:10 Preparing the Lower Receiver
01:58 Removing the Grip for Installation
02:26 Setting Up for the Build
03:00 Installing the Receiver Extension
03:34 Installing the Castle Nut
04:05 Mounting in the Vise
04:30 Using the LAW Lower Alignment Tool
05:30 Aligning Receiver and Extension
06:20 Tightening and Securing
07:00 Staking the Castle Nut
08:30 Removing the Tool After Use
09:10 Final Thoughts and Tool Impressions
09:40 Viewer Questions and Tech Support Info
Other videos mentioned here:
-Installing the LAW Folder- youtube.com/watch?v=SenQXacAXuA
-How to Stake a Castle Nut- youtube.com/watch?v=030036jJius
In this Quick Tip, Caleb from Brownells walks through how to properly use the LAW Lower Alignment Tool when assembling an AR-15 lower receiver. This tool is designed to perfectly align your receiver extension (buffer tube) with the lower, improving reliability and simplifying the staking process. Whether you're building your first AR or refining your gunsmithing workflow, the LAW Lower Alignment Tool, paired with the Geissele Reaction Block, makes setup fast, repeatable, and accurate.
Chapters & Timestamps:
00:00 Introduction to the LAW Lower Alignment Tool
00:24 Unboxing and Initial Impressions
00:50 Required Tools: Geissele Reaction Block
01:10 Preparing the Lower Receiver
01:58 Removing the Grip for Installation
02:26 Setting Up for the Build
03:00 Installing the Receiver Extension
03:34 Installing the Castle Nut
04:05 Mounting in the Vise
04:30 Using the LAW Lower Alignment Tool
05:30 Aligning Receiver and Extension
06:20 Tightening and Securing
07:00 Staking the Castle Nut
08:30 Removing the Tool After Use
09:10 Final Thoughts and Tool Impressions
09:40 Viewer Questions and Tech Support Info
