This 9mm AR 15 Pistol is DIRT CHEAP...But Why?

Published on April 21, 2019
Duration: 16:05

This guide details the installation and testing of the EndoMag 9mm conversion kit for AR-15 platforms. The video highlights how to convert standard Magpul PMAGs to accept 9mm ammunition, offering a cost-effective training solution. It also covers compatibility issues and performance variations with different upper receivers, emphasizing the importance of proper component selection for reliable function. The host, an experienced firearm builder, provides an honest assessment of the system's pros and cons for range use.

Quick Summary

The EndoMag 9mm conversion kit allows standard Magpul PMAGs to fire 9mm in an AR-15 lower, offering a cost-effective training solution with a similar manual of arms. While it provides adjustable capacity and last-round bolt hold open, compatibility varies by upper receiver, with some combinations experiencing malfunctions. It's recommended for range use due to potential reliability differences.

Chapters

  1. 00:00Introduction to 9mm AR-15 Conversion
  2. 00:33Comparison of 9mm AR Options
  3. 01:01Previous Builds and New Components
  4. 01:31Benefits of 9mm AR-15s
  5. 03:11EndoMag Technical Details
  6. 07:28Range Testing: Faxon Upper
  7. 08:00Range Testing: FM Products Upper
  8. 10:13Technical BCG Comparison
  9. 12:46Compatibility Warnings
  10. 14:18Final Verdict

Frequently Asked Questions

What is the EndoMag 9mm conversion kit and how does it work?

The EndoMag is a conversion insert that allows standard Magpul PMAGs (Gen 2/3) to function with 9mm ammunition in an AR-15 lower receiver. It replaces the original magazine's internals, providing last-round bolt hold open and adjustable capacity.

Is the EndoMag system compatible with all 9mm AR-15 uppers?

No, the EndoMag is not universally compatible. It has specific compatibility requirements, notably being incompatible with CMMG Banshee/Guard uppers unless using a specific adapter. Performance varies with different upper receiver brands.

What are the benefits of using a 9mm AR-15 with EndoMags for training?

Using a 9mm AR-15 with EndoMags offers a significant cost saving for training (around 15 cents per round vs. 30 cents for 5.56x45mm). It also maintains the familiar AR-15 manual of arms and allows for safer close-range shooting on steel targets.

What are the potential drawbacks or reliability concerns with the EndoMag system?

Reliability can vary depending on the specific 9mm upper receiver used. Some combinations, like certain FM Products uppers, have shown multiple malfunctions, while others, like Faxon Firearms uppers, have performed reliably. It's recommended for range use rather than self-defense.

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