The SECRET to Making Your AR Run on Glock Mags Revealed

Published on August 2, 2021
Duration: 14:05

This video details converting an AR-15 to run on Glock magazines using a Sylvan Arms mag block. While offering cost savings and common magazine compatibility, the setup can suffer from reliability issues, particularly with aftermarket triggers causing malfunctions. The lack of Last Round Bolt Hold Open (LRBHO) is a significant drawback, leading the host to recommend alternatives like Stern Defense for a more complete solution.

Quick Summary

Converting an AR-15 to 9mm with a magazine block offers cheaper ammo and lower recoil. However, issues like incompatible triggers causing malfunctions and the lack of Last Round Bolt Hold Open (LRBHO) are common. Stern Defense blocks are recommended for including LRBHO.

Chapters

  1. 00:00Intro: 9mm AR Conversions & Sylvan Arms Block
  2. 00:34Initial Range Test: Malfunctions & Trigger Issues
  3. 02:22Why Choose a 9mm AR? Benefits Explained
  4. 03:44Sylvan Arms Mag Block Mechanics & Installation
  5. 05:47Troubleshooting: Trigger Incompatibility Solved
  6. 08:36Drawbacks: No LRBHO & Manual of Arms Change
  7. 10:11Advantages: Cost & Glock Magazine Compatibility
  8. 11:52Final Verdict & Competitor Comparison (Stern Defense)

Frequently Asked Questions

What are the main benefits of converting an AR-15 to shoot 9mm using a magazine block?

Converting to 9mm offers cheaper ammunition for training, lower recoil making it suitable for new shooters, and reduced over-penetration with hollow points for home defense. It also allows the use of common Glock magazines.

What common problems can occur with 9mm AR-15 conversions using magazine blocks?

Reliability issues can arise, particularly from incompatible aftermarket triggers interfering with the bolt or magazine. A significant drawback is the lack of Last Round Bolt Hold Open (LRBHO), impacting the manual of arms.

How does the Sylvan Arms 9mm mag block work and what are its drawbacks?

The Sylvan Arms block fits a standard AR-15 lower and uses Glock magazines. Its main drawbacks are the absence of LRBHO and a relocated magazine release that changes the manual of arms, requiring manual charging after reloads.

What is a recommended alternative to the Sylvan Arms 9mm mag block?

The Stern Defense magazine conversion block is recommended as a superior alternative. It offers similar Glock magazine compatibility but includes the crucial Last Round Bolt Hold Open (LRBHO) feature, albeit at a slightly higher cost.

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