Gen5 Glock 21 MOS Review: Still The King Of 45ACP Handguns?

Published on February 22, 2024
Duration: 17:26

This guide details the field stripping procedure for the Gen5 Glock 21 MOS, as demonstrated by Mrgunsngear. It covers the critical safety steps, disassembly of the slide, barrel, and recoil spring assembly, and inspection of internal components like the striker safety and trigger bar. Reassembly and function checks are also included, emphasizing the importance of a thorough safety check throughout the process.

Quick Summary

The Gen5 Glock 21 MOS is a modernized .45 ACP handgun featuring a Marksman barrel for accuracy, the Modular Optic System (MOS) for red dot sights, and an nDLC finish for durability. While generally reliable over 1000+ rounds, older magazines can cause malfunctions. Its large frame and modular backstraps suit larger hands, and recoil is manageable due to its low bore axis.

Chapters

  1. 00:35Introduction to Gen5 Glock 21 MOS
  2. 01:25Glock Marksman Barrel
  3. 03:05Magazines and Magwell
  4. 04:34Grip and Ergonomics
  5. 05:26Controls and Trigger
  6. 08:04Slide Finish and Sights
  7. 10:12Disassembly and Internals
  8. 12:29Reliability and Performance

Frequently Asked Questions

What are the key features of the Gen5 Glock 21 MOS?

The Gen5 Glock 21 MOS includes modernized features like a two-pin design, lack of finger grooves, forward slide serrations, and the Modular Optic System (MOS) for red dot sights. It also boasts a Marksman barrel for improved accuracy and an nDLC finish for durability.

How reliable is the Gen5 Glock 21 MOS?

During testing of over 1,000 rounds, the Gen5 Glock 21 MOS experienced three malfunctions, primarily double feeds attributed to older magazines. The dual recoil spring system and low bore axis contribute to manageable recoil.

What are the ergonomics and handling characteristics of the Gen5 Glock 21 MOS?

The Gen5 Glock 21 MOS is a large-frame handgun suited for larger hands, featuring modular backstraps for grip adjustment and a flared magwell for faster reloads. Its low bore axis aids in managing recoil.

What are the recommended upgrades for the Gen5 Glock 21 MOS?

The reviewer suggests upgrading the standard factory plastic sights, which are criticized for their durability and visibility, to a more robust aftermarket option like XS Sights.

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