AR-15 Pistol Build

Published on February 1, 2010
Duration: 6:19

This guide details the process of building a 9mm AR-15 pistol, focusing on modifying a 16-inch barrel to pistol length and adapting STEN magazines using custom blocks. The build emphasizes ease of use and affordability, with insights into part sourcing and fabrication. Instruction is provided by an experienced builder, highlighting safety and legal considerations.

Quick Summary

Building a 9mm AR-15 pistol involves cutting down a 16-inch barrel to pistol length and adapting STEN magazines with custom blocks. This configuration offers a compact, stable shooting platform with minimal recoil. Always prioritize safety and ensure compliance with all federal and state firearm laws.

Chapters

  1. 00:23Initial Test Fire & Configuration
  2. 00:54Build Update & Parts Sourcing
  3. 01:27Pistol Build Advantages
  4. 01:51Safety Check & Build Progress
  5. 02:08Barrel Modification & Muzzle Device
  6. 02:28Handguard & Magazine Blocks
  7. 02:57Barrel Length Comparison & Lower
  8. 03:34Lower Parts Kit & Upper Finish
  9. 03:48Internal Build Details
  10. 04:16Legal Disclaimer
  11. 04:34Call to Action

Frequently Asked Questions

How do you adapt STEN magazines for an AR-15 pistol build?

Adapting STEN magazines for an AR-15 pistol build typically involves fabricating custom magazine blocks. These blocks are designed to fit within the AR-15's magazine well and interface with the STEN magazine, while also utilizing the standard AR-15 magazine release mechanism.

What are the key advantages of an AR-15 pistol configuration?

The AR-15 pistol configuration offers a compact and maneuverable platform. Its design allows for a stable sight picture by resting it on the cheek, resulting in a simple and effective shooting experience with notably minimal recoil.

What safety concerns are associated with modifying an AR-15 barrel for a pistol build?

A significant safety concern is ensuring the barrel is correctly cut to pistol length and properly threaded for a muzzle device. Additionally, any muzzle device must have a bore appropriately sized for the 9mm caliber to prevent dangerous pressure build-up.

Is it legal to cut down an AR-15 barrel to pistol length?

Cutting down an AR-15 barrel to pistol length is legal as long as the resulting firearm is configured as a pistol and not an unregistered Short-Barreled Rifle (SBR). Always verify federal and state laws, as creating an SBR without the proper tax stamp is illegal.

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