Glock 19 Gen 4 MOS for Sale

If you’re looking for a Glock 19 Gen 4 MOS for sale, you’re choosing a proven compact 9mm pistol with added optic-ready capability. The Glock 19 Gen 4 MOS combines Glock’s legendary reliability with modular ergonomics and MOS compatibility, making it a strong option for duty use, home defense, range training, and defensive carry.

Product Description | Specs Glock

The Glock 19 Gen 4 MOS for sale features Glock’s Safe Action® striker-fired system and the Modular Optic System (MOS), allowing shooters to mount select red dot optics using adapter plates. The Gen 4 platform also introduced interchangeable backstraps and a reversible magazine release, improving fit and usability for a wide range of shooters.

Glock 19 Gen 4 MOS Specifications:

• Caliber: 9×19mm
• Capacity: 15+1 rounds
• Barrel Length: 4.02 inches
• Overall Length: 7.36 inches
• Weight (Unloaded): Approx. 23.65 oz
• Action: Striker-fired
• Frame Size: Compact
• Finish: Tenifer / black finish
• Optics Ready: MOS slide cut

Anyone searching for a Glock 19 Gen 4 MOS for sale will appreciate its balance of compact size, optic compatibility, and proven Glock performance.

Features

The Glock 19 Gen 4 MOS for sale includes several key features that make it a reliable and adaptable handgun:

• Modular Optic System (MOS) for mounting red dot sights
• Interchangeable backstrap system for customized grip fit
• Reversible magazine release for left- or right-handed shooters
• Dual recoil spring assembly for reduced felt recoil
• Textured grip surface for improved control
• Proven Glock reliability and simple operation

These features make the Glock 19 Gen 4 MOS a solid choice for shooters who want optic-ready capability on a trusted platform.

What the Glock 19 Gen 4 MOS Is Made Of

The Glock 19 Gen 4 MOS for sale is constructed using durable materials designed for long-term reliability:

• Frame: High-strength polymer
• Slide: Steel with protective finish
• Barrel: Cold hammer-forged steel
• Internal Parts: Hardened steel components

This construction helps ensure consistent performance in demanding conditions.

Glock 19 Gen 3 vs Gen 4 MOS

When comparing a Glock 19 Gen 4 MOS for sale to the Gen 3 model, the Gen 4 MOS offers notable improvements.

Gen 3:

• Fixed grip size
• Single recoil spring
• Non-optic-ready slide
• Single-sided magazine release

Gen 4 MOS:

• Interchangeable backstraps
• Dual recoil spring assembly
• MOS optic-ready slide
• Reversible magazine release

The Gen 4 MOS provides better ergonomics and modern optics compatibility.

Glock 19 Gen 4 MOS vs Gen 5 MOS

Buyers often compare the Glock 19 Gen 4 MOS to the newer Gen 5 MOS.

Gen 4 MOS Features:

• Interchangeable backstraps
• Reversible magazine release
• Finger grooves
• MOS optic-ready slide

Gen 5 MOS Improvements:

• Glock Marksman Barrel
• No finger grooves
• Ambidextrous slide stop
• Flared magwell
• Updated internal design

The Gen 4 MOS remains popular for shooters who prefer finger grooves and proven Gen 4 ergonomics.

Compatibility

The Glock 19 Gen 4 MOS for sale is compatible with many Glock accessories, with a few considerations:

• Magazines: Works with Gen 3, Gen 4, and Gen 5 Glock 19 magazines
• Holsters: Compatible with most Glock 19 holsters designed for MOS models
• Sights: Compatible with MOS-height iron sights
• Optics: Supports select red dot optics via MOS adapter plates
• Parts: Extensive aftermarket support

Always confirm compatibility before purchasing accessories or optics.

Glock 19 Gen 4 MOS Pros and Cons

Pros

• Proven Glock reliability
• Compact size with optic-ready capability
• Interchangeable backstraps for grip customization
• Strong aftermarket and accessory support
• Typically more affordable than Gen 5 MOS models

Cons

• Finger grooves may not suit all shooters
• Lacks Glock Marksman Barrel found on Gen 5
• MOS plate system is less refined than newer designs

FAQs

Is the Glock 19 Gen 4 MOS suitable for concealed carry?
Yes, its compact size makes it suitable for concealed carry, though optic-equipped setups may require specialized holsters.

What does MOS mean on the Glock 19 Gen 4?
MOS stands for Modular Optic System, allowing the mounting of compatible red dot sights.

Is the Glock 19 Gen 4 MOS good for beginners?
Yes, its manageable recoil, simple operation, and reliability make it beginner-friendly.

Does the Glock 19 Gen 4 MOS include optic plates?
Yes, MOS models include adapter plates for mounting compatible optics.

DISCLAIMER

Duty Pistols Inc provides aftermarket and compatible parts and components for GLOCK pistols. We operate independently and do not represent, endorse, or have any connection with GLOCK, Inc. or GLOCK Ges.m.b.H.

GLOCK, Inc. and GLOCK Ges.m.b.H own the trademark “GLOCK” and other related marks. We mention “GLOCK” only to identify parts and products that fit or work with GLOCK pistols.