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

Published on February 22, 2024
Duration: 17:26

The Gen5 Glock 21 MOS retains its position as a capable .45 ACP handgun, featuring a modernized design with a Marksman barrel for improved accuracy and an MOS system for optics. While ergonomics suit larger hands and the trigger is standard Glock, the flared magwell and ambidextrous slide stop enhance usability. Despite a few early malfunctions, likely due to older magazines, the pistol proved reliable over 1000+ rounds, offering manageable recoil.

Quick Summary

The Gen5 Glock 21 MOS is a modernized .45 ACP handgun featuring a Marksman barrel for enhanced accuracy and an MOS system for optics. It offers a flared magwell, ambidextrous controls, and proved reliable over 1000 rounds, though factory sights are a common upgrade recommendation.

Chapters

  1. 00:35Introduction: Gen5 Glock 21 MOS Features
  2. 01:25Glock Marksman Barrel Explained
  3. 03:05Magazines and Magwell Design
  4. 04:34Grip and Ergonomics for Large Hands
  5. 05:26Controls and Gen5 Trigger Pull
  6. 08:04Slide Finish and Sight Upgrade
  7. 10:12Disassembly and Internals
  8. 12:29Reliability Test: 1000+ Rounds

Frequently Asked Questions

What are the key upgrades in the Gen5 Glock 21 MOS compared to previous generations?

The Gen5 Glock 21 MOS features a new Marksman barrel for improved accuracy, a flared magwell for faster reloads, an ambidextrous slide stop, and the Modular Optic System (MOS) for easy red dot sight mounting. It also lacks finger grooves and has forward slide serrations.

How reliable is the Gen5 Glock 21 MOS based on the 1000-round test?

The Gen5 Glock 21 MOS demonstrated good reliability over 1000 rounds, with only three malfunctions (double feeds) reported. These were largely attributed to older magazines, suggesting the firearm itself is robust.

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

The Glock 21 Gen5 MOS is a large-frame handgun best suited for those with larger hands. It includes modular backstraps for grip customization and features a flared magwell and ambidextrous slide stop, enhancing handling.

What is the recommended upgrade for the Gen5 Glock 21 MOS?

The most recommended upgrade for the Gen5 Glock 21 MOS is replacing the factory plastic sights. Upgrading to aftermarket sights, such as XS Sights, significantly improves aiming capabilities and target acquisition.

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