Glock G43X MOS 9mm Threaded Barrel (Black)

GLOCK G43X MOS 9mm – 15+1, 3.41″ Threaded Barrel, Optics Ready

Slim-Line Carry. 15-Round Capacity. Threaded and Optics Ready.

The GLOCK G43X MOS UX4350203FRMOSTB takes the popular slim-frame G43X platform and adds features aimed at shooters who want more capability from a compact 9mm pistol. This configuration combines a 3.41-inch black threaded barrel, optics-ready MOS slide, accessory rail, and an impressive 15+1-round capacity in the slim G43X format.

The MOS (Modular Optic System) slide is cut for compatible micro red-dot optics, allowing shooters to build a modern carry or range setup without having the slide custom machined. Front and rear slide serrations provide additional gripping surfaces for slide manipulation, while the slim polymer frame maintains the comfortable dimensions that have made the G43X a popular compact pistol.

A factory-configured threaded barrel adds another level of versatility for compatible muzzle devices or suppressors where lawful. Combined with the accessory rail for a compact weapon light and 15-round magazine capacity, this G43X MOS offers considerably more capability than its compact dimensions might suggest.

Key Features

• Manufacturer: GLOCK
• Model: G43X MOS
• Manufacturer Part #: UX4350203FRMOSTB
• Caliber: 9mm Luger
• Action: Striker-fired semi-automatic
• Capacity: 15+1 rounds
• Barrel Length: 3.41″
• Barrel: Black threaded barrel
• Slide: Steel, black finish
• MOS optics-ready slide
• Front and rear slide serrations
• Slim-line polymer frame
• Integrated accessory rail
• Compact profile for easier carry
• GLOCK Safe Action system
• Ambidextrous-friendly controls/configuration as applicable
• Designed to accept compatible micro red-dot optics

Why It Stands Out

This particular G43X MOS configuration brings together three highly desirable upgrades: 15-round capacity, an optics-ready slide, and a threaded barrel.

You still get the thin, easy-to-handle profile of the G43X, but with capacity approaching larger defensive pistols and a platform that’s already prepared for an optic, weapon light, and compatible muzzle device.

Perfect For

Shooters looking for a slim 9mm pistol with increased capacity, optics capability, threaded-barrel versatility, range use, and a compact platform that can be configured with modern accessories.