The SECRET to Making Your AR Run on Glock Mags Revealed

Published on August 2, 2021
Duration: 14:05

This guide details the process of converting a standard AR-15 lower receiver to accept Glock magazines using the Sylvan Arms 9mm Mag Block. It covers installation, magazine compatibility, and crucial troubleshooting steps, particularly regarding trigger group compatibility which can cause significant malfunctions. The expert instructor highlights the trade-offs, including the lack of Last Round Bolt Hold Open (LRBHO) on some systems and the benefits of cheaper ammunition for training.

Quick Summary

Converting an AR-15 to 9mm using a Glock magazine block like Sylvan Arms offers cheaper training ammo and reduced recoil. However, be aware of potential issues like the lack of LRBHO and trigger incompatibility, which can cause malfunctions. Stern Defense is a recommended alternative offering LRBHO.

Chapters

  1. 00:00Introduction to 9mm AR Conversions
  2. 00:34Initial Range Testing and Malfunctions
  3. 02:22Benefits of the 9mm AR Platform
  4. 03:44Sylvan Arms Mag Block Mechanics
  5. 05:47Troubleshooting Trigger Incompatibility
  6. 08:36Cons: LRBHO and Manual of Arms
  7. 10:11Pros: Cost and Magazine Compatibility
  8. 11:52Final Verdict and Competitor Comparison

Frequently Asked Questions

How do I convert my AR-15 to use Glock magazines?

You can convert your AR-15 to use Glock magazines by installing a specialized magazine block, such as the Sylvan Arms 9mm Mag Block, into your standard AR-15 lower receiver. This block allows Glock 19 or larger magazines to be inserted and function.

What are the main benefits of converting an AR-15 to 9mm?

Converting to 9mm offers significant advantages, primarily lower ammunition costs for training. It also provides reduced recoil, making it suitable for new shooters, and less over-penetration with hollow-point rounds for home defense scenarios.

What are the common problems with 9mm AR conversions?

Common issues include the lack of a Last Round Bolt Hold Open (LRBHO) feature and potential malfunctions caused by incompatible aftermarket trigger groups. The magazine release position may also change, altering the manual of arms.

Which 9mm AR conversion system is recommended?

While the Sylvan Arms block is functional, experts often recommend systems like Stern Defense that include LRBHO. This feature enhances usability by locking the bolt open on an empty magazine, simplifying reloads.

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