Selected Handgun Detail

Manufacturer
	Glock Ges.m.b.H. More Info

About the Gun

Fourth-generation full-size pistol incorporating the Modular Optic System with a factory-milled slide that accepts miniature reflex sights through interchangeable adapter plates without requiring additional machining. It includes interchangeable backstraps for grip customization, an enlarged reversible magazine release, a dual-recoil-spring assembly, and rough-textured frame surfaces.

Production

This variant was produced from 2016 through 2025.

Market value

MSRP at production was around $700. Used examples in standard condition currently trade in the $600-$660 range.

Cartridge Specifications
Cartridge:	9 mm Luger
Alias:	9 mm Parabellum
More Info

Analysis

Introduction of the MOS configuration on the Gen4 platform responded to increasing interest in pistol-mounted optics among law enforcement and civilian users. The factory-integrated slide cut preserved the pistol's standard operating characteristics while simplifying optic installation compared to aftermarket modifications on earlier models. Production volumes were lower than those of the non-MOS variant, resulting in fewer examples reaching the market before the broader shift away from the Gen4 series. On the secondary market these optics-ready units have retained stronger demand and value relative to standard counterparts due to the added utility of the sighting interface.