The Difference Between Gen 3 & Gen 5 Glocks

Published on October 13, 2023
Duration: 18:12

This guide, presented by Lenny Magill, founder of GlockStore, details how to differentiate between Glock Gen 3 and Gen 5 models. Key identification points include slide markings, the presence of an MOS plate, magazine follower color, frame pin configuration, slide stop lever design, and striker tip shape. Understanding these differences is crucial for proper firearm identification and accessory compatibility.

Quick Summary

Glock Gen 5 pistols are distinguished from Gen 3 models by explicit 'Gen 5' slide markings, a single frame pin above the trigger (vs. two on Gen 3), and an orange magazine follower for better visibility (vs. black on Gen 3). MOS versions feature a removable optic mounting plate on the slide.

Chapters

  1. 00:00Introduction to Glock Gen 5 MOS
  2. 01:26Gen 5 vs. Gen 3 General Differences
  3. 02:51Identifying Glock Generations
  4. 04:42MOS Adapter Plates
  5. 07:21Frame and Control Changes
  6. 08:45Internal Component Differences
  7. 10:06Magazine Compatibility
  8. 11:34Barrel and Guide Rod Interchangeability
  9. 13:01Striker and Grip Texture

Frequently Asked Questions

What are the main visual differences between Glock Gen 3 and Gen 5 pistols?

Gen 5 slides are explicitly marked 'Gen 5', while Gen 3 usually only shows the model number. Gen 5 frames have a single pin above the trigger, compared to two pins on Gen 3. Additionally, Gen 5 magazines feature an orange follower, while Gen 3 uses a black one.

How can I identify a Glock MOS (Modular Optic System) model?

Glock MOS models are identifiable by a removable plate on the top of the slide, typically secured by two screws. This plate allows for direct mounting of various red dot sights, though specific adapter plates may be needed depending on the optic.

Are internal parts interchangeable between Glock Gen 3 and Gen 5?

No, not all internal parts are interchangeable. For example, the Gen 5 striker tip has a different pin shape and is not compatible with Gen 3 models. While some parts like guide rods might be, it's crucial to verify compatibility for each specific component.

What is the significance of the magazine follower color difference between Glock generations?

The high-visibility orange follower in Gen 5 magazines makes it easier to visually confirm if the magazine is empty or if the chamber is clear, compared to the black follower found in Gen 3 magazines. This aids in safe handling and status checks.

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