Glock MOS Slide – G19 Gen 3, Optics Ready

Upgrade Your Glock 19 Gen 3 to Optics-Ready Precision, Enhance your Glock 19 Gen 3 with the Glock Modular Optic System (MOS) Slide, designed for shooters who demand adaptability and modern performance. This factory Glock slide comes fully assembled with internals and standard sights, and is ready to accept popular red dot optics thanks to the integrated MOS platform.

Whether you’re building a custom Glock or upgrading your current setup, this is the ultimate solution for adding slide-mounted optics without aftermarket machining.

Glock OEM parts and accessories are made with the same attention to detail and quality as the ultra-reliable pistols. From firing pins to trigger springs, nothing keeps your Glock running like OEM parts.

GLOCK engineers have developed the Modular Optic System (MOS) configuration to simplify mounting of popular optical sights.

Optical sights improve the accuracy at both long and short range, enabling faster target transition and quicker sight acquisition of your target. The MOS configuration is the best choice to hit your target.

Slimline MOS
The Slimline MOS pistol models have slide cuts designed for specific micro-optics and do not need Adapter Plates.

Standard MOS
GLOCK pistol models in standard MOS configuration now come with a single MOS adapter plate. The adapter plate included will fit the following: Trijicon®, Ameriglo®, and Holosun® (except 509). If your selected optic is not compatible with any of the above, 

Key Features

• ✅ Fits Glock 19 Gen 3 Frames
  Factory-engineered for a perfect fit on Glock 19 Gen 3 pistols.

• ✅ MOS Cut – Optics Ready
  Accepts most popular red dots (Trijicon RMR, Holosun, etc.) using adapter plates (not included).

• ✅ Factory Glock Quality
  Built to Glock’s legendary standards—durable, reliable, and ready for hard use.

• ✅ Assembled Slide Internals
  Includes factory-installed extractor, firing pin assembly, channel liner, and striker assembly—no gunsmithing required.

• ✅ Standard Glock Sights Installed
  Ready to use out of the box or upgrade to suppressor-height sights for co-witnessing.

• ✅ MOS Cover Plate Included
  Covers optic cut when not in use for a clean, professional look.

What’s Included

• 1x Glock 19 Gen 3 MOS Slide (Complete with Internals)

• 1x MOS Cover Plate

• 1x Set of Standard Glock Sights

Note: Does not include barrel, recoil spring assembly, or optic adapter plates.

Perfect For:

• Glock Custom Builds

• Duty, Carry & Tactical Setups

• Competition Shooting

• ️ Red Dot Sight Integration

Also Available:

Glock Backstrap & Beavertail Set – Flat Dark Earth (FDE) Polymer