Glock 21 10mm Conversion: Review & How To (HD)

Published on October 30, 2012
Duration: 6:30

This guide details the process of converting a Glock 21 from .45 ACP to 10mm Auto, based on expert instruction. It covers the necessary parts, including a KKM Precision barrel and a modified extractor, and outlines the disassembly and reassembly steps. The video emphasizes testing reliability and performance with various 10mm loads.

Quick Summary

Converting a Glock 21 to 10mm Auto involves installing a specific 10mm conversion barrel (e.g., KKM Precision), a heavier recoil spring (20lb), and a modified 10mm extractor. This modification significantly boosts muzzle velocity, with tested 10mm loads exceeding 1300 FPS from a 6-inch barrel, enhancing ballistic performance.

Chapters

  1. 00:00Introduction and Stock Shooting
  2. 01:0210mm Conversion Shooting Demo
  3. 01:47Conversion Process and Parts
  4. 05:07Chronograph Testing

Frequently Asked Questions

What parts are needed to convert a Glock 21 to 10mm?

A successful Glock 21 to 10mm conversion requires a 10mm conversion barrel (like KKM Precision), a stronger recoil spring assembly (e.g., 20lb Lone Wolf), and a modified 10mm extractor. Standard Glock 20 magazines are also used.

How does the 10mm conversion affect Glock 21 performance?

Converting a Glock 21 to 10mm significantly increases muzzle velocity, with tested loads exceeding 1300 FPS from a 6-inch barrel. This offers more power and flatter trajectory compared to .45 ACP.

Is a Glock 21 to 10mm conversion reliable?

The video demonstrates reliable function with various 10mm loads after conversion, provided the correct components like a modified extractor and appropriate recoil spring are used. Proper assembly is key.

What are the benefits of converting a Glock 21 to 10mm?

The primary benefit is increased ballistic performance, offering higher velocities and energy than .45 ACP. This conversion allows users to leverage the potent 10mm Auto cartridge in a familiar Glock platform.

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