AR-15 Lower Receiver Assembly Tips Presented by Larry Potterfield of MidwayUSA

Published on March 20, 2009
Duration: 1:31

This guide provides essential tips for assembling an AR-15 lower receiver, emphasizing pre-assembly cleaning and inspection of all holes. It highlights using specialized tools like the AR Stoner fixture for trigger guard roll pin installation to prevent receiver ear damage and a Crosstac hammer block for safe trigger function testing. Following these steps helps avoid common errors in building this complex firearm component.

Quick Summary

To safely assemble an AR-15 lower receiver, first inspect and clean all holes. Use a fixture like the AR Stoner model to support receiver ears during trigger guard roll pin installation. Test trigger function with a plastic hammer block (e.g., Crosstac) to prevent damage to the bolt stop.

Chapters

  1. 00:00Introduction to AR-15 Receivers
  2. 00:21Pre-Assembly Inspection and Cleaning
  3. 00:37Trigger Guard Installation Tip
  4. 00:56Testing Trigger Function
  5. 01:09Conclusion: AR-15 Lower Receiver Parts

Frequently Asked Questions

What are the key steps for assembling an AR-15 lower receiver?

Begin with a thorough inspection and cleaning of the receiver. Use specialized tools like a fixture for trigger guard roll pin installation and a plastic hammer block for safe trigger function testing to prevent damage and ensure a successful build.

How can I avoid damaging the receiver ears during AR-15 lower assembly?

To prevent damage to the receiver ears when installing the trigger guard roll pin, use a support fixture, such as the one from AR Stoner. This provides the necessary stability and alignment during the process.

What is the purpose of a plastic hammer block in AR-15 assembly?

A plastic hammer block, like the Crosstac model, is used to safely test the trigger mechanism. It prevents the hammer from forcefully striking the bolt stop, thus avoiding potential damage during function checks.

How many parts are typically in an AR-15 lower receiver assembly?

An AR-15 lower receiver assembly consists of approximately 40 different parts. Careful assembly and the use of appropriate tools are essential to ensure all components function correctly together.

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