Gen5 MOS
Compact | 40 S&W

G23 Gen5 MOS

GLOCK’s compact 40 S&W, equivalent of the GLOCK 19 Gen5, puts controllable power into an ideally-sized package - substantial enough for police patrol, small enough for discreet and comfortable all-day concealed carry. It is the top choice for professionals who work undercover. 

With the release of the G23 Gen5 the newest generation GLOCK standard is now available in 40 S&W.

By applying the Gen5 technology this model comes with nDLC finish, a flared mag-well, the proven GLOCK Marksman barrel (GMB) and an ambidextrous slide stop lever. 

Adjustable like the Gen4 model the frame of the G23 Gen5 features the Modular Beavertail Backstrap System (MBS) and comes with a reversible magazine catch.

For simplified mounting of optical sights this model comes with 4 numbered GLOCK MOS Adapter plates.

Note: The slide width of the 40 S&W Gen5 models is slightly bigger compared to the previous generation. Please consider when choosing your holster. 

G23 Gen5 MOS - modular optic system

Modular optic system - MOS

The modular optic system (MOS) configuration offers the possibilty to simplify the mounting of popular optical sights.

Learn more about the Modular Optic System
G23 Gen5 MOS - front serrations

Front serrations (FS)

Front serrations provide a different look and an additional tactile surface.
G23 Gen5 MOS - nDLC finish

nDLC finish on barrel and slide

GLOCK's nDLC provides tougher, more durable protection than previously used finish. The nDLC finish increases protection against corrosion and scratching and improves the ability of the pistol to function in adverse conditions.
G23 Gen5 MOS - slide stop lever

Ambidextrous slide stop lever

The ambidextrous slide stop lever makes it easier for gun owners to quickly, safely and comfortably manipulate the slide whether they are left-handed or right-handed.
G23 Gen5 MOS - GLOCK Marksman barrel

GLOCK Marksman barrel

The GLOCK Marksman barrel (GMB) features enhanced barrel rifling based on the proven polygonal barrel design which delivers improved accuracy.
G23 Gen5 MOS - flared mag well

Flared magwell for speedloading

The larger opening of the flared magwell makes it easier to funnel the magazine into the magwell, particularly in high-stress situations where fractions of seconds matter.
G23 Gen5 MOS - no finger grooves

Versatility by removal of the finger grooves

Comfortable grip to a wider range of consumers, regardless of their hand size.
G23 Gen5 MOS - Safe Action® System

Safe Action® System

Three safeties disengage sequentially as the trigger is pulled and automatically reengage when the trigger is released.

Learn more about the Safe Action® System
G23 Gen5 MOS - enlarged floor plate

Enlarged floor plate

The enlarged front of the floor plate makes it easier to pull the magazine free of the pistol if it doesn't fall free during malfunction or reload.
G23 Gen5 MOS - orange follower

Safety advantage through orange follower

The orange follower allows the shooter to clearly see if there are any rounds left in the magazine or not.
G23 Gen5 MOS - magazine capacity

Magazine capacity

Depending on caliber and size of the pistol model high capacity magazines are available.
G23 Gen5 MOS - backstrap

Customizable frame size

Every GLOCK Gen5 comes with beavertail backstraps in two different sizes. The backstrap frame allows the users to change the circumference of the grip to fit their individual hand size.
G23 Gen5 MOS - gen4 rtf

Gen4 RTF - Rough textured frame

The Gen4 proven rough textured frame surface is present on the Gen5 frame as well. It was designed to enhance grip traction, without being too aggressive.
G23 Gen5 MOS - magazine catch

Reversible magazine catch

The magazine catch of the Gen5 frame is reversible and enlarged towards the rear of the pistol. The reversible magazine catch is more user friendly to the shooter's reach and allows them to switch the catch to the left or right side of the pistol. 
G23 Gen5 MOS - mounting rail

Mounting rail

Mounting rails in front of the trigger guard of all competition, standard and compact frames allow mounting accessories such as tactical lights and lasers.
G23 Gen5 MOS - polymer frame

Polymer frame

The durable and lightweight polymer frame absorbs recoil due to the dampening characteristics of the polymer.
G23 Gen5 MOS - loaded chamber indicator

Loaded chamber indicator

Visible and palpable indicator as part of the extractor to show whether there is a cartridge in the chamber.

40 S&W


Safe Action®

Mag. Capacity

Standard: 13

Optional: 14 / 15 / 16 / 22

Barrel Length

102 mm | 4.02 inch


without magazine

687 g | 24.23 oz


with empty magazine

756 g | 26.67 oz


with loaded magazine**

974 g | 34.36 oz

Trigger Pull***

26 N

1 LENGTH (OVERALL)* 185 mm | 7.28 inch
2 SLIDE LENGTH 174 mm | 6.85 inch
3 WIDTH (OVERALL) 34 mm | 1.34 inch
4 SLIDE WIDTH 27.5 mm | 1.08 inch
5 HEIGHT INCL. MAG. 129 mm | 5.08 inch
6 Sight Radius POLYMER 156 mm | 6.14 inch
Sight Radius STEEL 155 mm | 6.10 inch
Sight Radius GNS 154 mm | 6.06 inch
7 TRIGGER DISTANCE* 70 mm | 2.76 inch

* FOR GEN4/GEN5 MODELS and G44: Check out the Gen5, Gen4 and G44 technology pages for medium/large beavertail backstraps (G19X and G45 see below).
Technical Data are rounded and do not reflect tolerances – they may be altered without notice! Subject to technical changes.
Dimensions of GLOCK Pistol G23 Gen5 MOS