Glock 21 Gen 4

Published on July 29, 2012
Duration: 13:36

The Glock 21 Gen 4 introduces a dual recoil spring assembly and an enlarged, reversible magazine release, aiming to improve recoil management and user ergonomics. While the modular backstrap system offers grip customization, its necessity is debated. The Gen 4 maintains compatibility with Gen 3 barrels and offers reliable combat accuracy, though the dual recoil spring's impact on felt recoil is minimal.

Quick Summary

The Glock 21 Gen 4 features a dual recoil spring assembly for recoil management and an enlarged, reversible magazine release for improved ergonomics. While the modular backstrap system offers grip customization, its necessity is debated. The Gen 4 maintains reliable combat accuracy and barrel compatibility with Gen 3 models.

Chapters

  1. 00:00Introduction & Initial Shooting
  2. 00:36Comparison with Glock 21 SF
  3. 01:13Gen 4 External Features: Modular Backstraps
  4. 02:05Internal Changes: Dual Recoil Spring
  5. 03:11Parts Compatibility: Barrels & Springs
  6. 04:07Lead Bullets & Aftermarket Barrels
  7. 05:12Magazine Release & Grip Texture
  8. 06:27Reliability & Performance Theory
  9. 07:33Accessories & Unboxing
  10. 08:21Recoil Comparison Test
  11. 09:42Lone Wolf Barrel Testing
  12. 10:24Accuracy Testing
  13. 11:01Final Verdict & Pricing

Frequently Asked Questions

What are the main internal changes in the Glock 21 Gen 4 compared to previous generations?

The most significant internal change in the Glock 21 Gen 4 is the introduction of a dual recoil spring assembly. This system is designed to help manage recoil and required a larger diameter hole at the front of the slide.

How does the grip texture and magazine release differ on the Glock 21 Gen 4?

The Gen 4 features an updated grip texture that is less aggressive than the RTF finish, making it more comfortable for carry. The magazine release is also significantly larger and reversible, offering improved ergonomics.

Can Glock 21 Gen 3 barrels be used with the Gen 4 model?

Yes, the reviewer demonstrated that Glock 21 Gen 3 SF barrels are compatible with the Gen 4 models, and vice-versa. This indicates a degree of cross-generation parts interchangeability for barrels.

What is the recommended practice for shooting lead bullets in a Glock 21 Gen 4?

Glock's polygonal rifling is not ideal for lead bullets due to potential buildup. It is recommended to use an aftermarket barrel with traditional rifling if you intend to shoot lead reloads safely.

Related News

All News →

More Reviews Videos You Might Like

More from Military Arms Channel

View all →