G20 Gen5 MOS
Gen5 MOS
Standard | 10 mm Auto


The G20 Gen5 MOS delivers formidable force downrange with high accuracy over long distance. The use of GLOCK hi-tech polymer considerably reduces felt recoil even in this heavy caliber. For the hunting community this 10 mm Auto is a reliable companion providing a safe and accurate finishing shot, even when hunting big game. 
GLOCK G17 Gen5 MOS - backstrap

Customizable frame size

Every GLOCK Gen5 comes with beavertail backstraps in two sizes. The backstrap frame allows the users to change the circumference of the grip to fit their individual hand size.
GLOCK G17 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.
GLOCK G17 Gen5 MOS - front serrations

Front serrations (FS)

To provide a different look and an additional tactile surface.
GLOCK G17 Gen5 MOS - Gen4 Rough textured frame

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 beeing to aggressive.
GLOCK G17 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.
GLOCK G17 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.
GLOCK G17 Gen5 MOS - reversible 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.
GLOCK G17 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, particulary in high-stress situations where fractions of a second matter.
GLOCK G17 Gen5 MOS - modular optic system
*optic not included

Modular optic system - MOS

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

Learn more about the Modular Optic System
GLOCK G17 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.
GLOCK G17 Gen5 MOS - nDLC coating

nDLC finish

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.
GLOCK G17 Gen5 MOS - orange magazine 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.
GLOCK G17 Gen5 MOS - polymer frame
Symbolic Image

Polymer frame

The durable and lightweight polymer frame absorbs recoil due to the dampening characteristics of the polymer.
GLOCK G17 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
GLOCK G17 Gen5 MOS - slide stop lever

Ambidextrous slide stop lever

The ambidextrous slide stop lever makes it easier for gun owners to quickly, safely and comfortable manipulate the slide wether they are left-handed or right-handed.

Versatility by removal of the finger grooves

Comfortable grip to a wider range of consumers, regardless of their hand size.

10 mm Auto


Safe Action®

Mag. Capacity

Standard: 15

Barrel Length

117 mm I 4.61 inch


without magazine

755 g I 26.63 oz


with empty magazine

845 g I 29.81 oz


with loaded magazine**

1100 g I 38.80 oz

Trigger Pull***

26 N

1 LENGTH (OVERALL)* 205 mm I 8.07 inch
2 SLIDE LENGTH 191 mm I 7.52 inch
3 WIDTH (OVERALL) 35 mm I 1.38 inch
4 SLIDE WIDTH 28,5 mm I 1.12 inch
5 HEIGHT INCL. MAG. 140 mm I 5.51 inch
6 Sight Radius POLYMER 176 mm I 6.93 inch
Sight Radius STEEL 175 mm I 6.89 inch
Sight Radius GNS 174 mm I 6.85 inch
7 TRIGGER DISTANCE* 72,5 mm I 2.85 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.