Two GLOCK Gen4 pistols with target


Gen4 customizable frame size

Customizable frame size

Every GLOCK Gen4 comes with backstraps in two sizes each one with and without beavertail. The multiple backstrap frame allows the users to change the circumference of the grip to fit their individual hand size.
Gen4 Reversible magazine catch

Reversible magazine catch

The magazine catch of the Gen4 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.
Gen4 Rough textured frame

Gen4 RTF - Rough textured frame

The Gen4 has a new rough textured frame (Gen4 RTF) surface designed to enhance grip traction, without being too aggressive. It is present on the frame as well as on the interchangeable backstraps.
Gen4 Safe Action System

Safe Action® System

Three safeties disengage sequentially as the trigger is pulled and automatically reengage when the trigger is released.
Same trigger pull for each shot - short trigger reset. 
Gen4 Surface refinement

Surface refinement

The surface of the GLOCK slide and barrel is black and non reflective. All GLOCK metal parts are subject to a surface treatment making them corrosion and salt water resistant.
Gen4  Polymer frame

Polymer frame

The durable and lightweight polymer frame absorbs recoil due to the dampening characteristics of the polymer.
Gen4 magazine capacity

Magazine capacity

Depending on caliber and size of the pistol model high capacity magazines are available.
Gen4 mounting rail

Mounting rail

Mounting rails in front of the trigger guard of all competition, standard and compact frames as well as on G29 and G30 allow mounting accessories such as tactical lights and lasers.
Gen4 Polygonal barrel profile

Polygonal barrel profile

The polygonal barrel is easy to clean and its better bullet-to-barrel fit increases the velocity of the projectile.
Gen4 pistol

Loaded chamber indicator

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

Customize the frame of GLOCK Gen4 models

Every GLOCK Gen4 pistol model allows the user to change the circumference of the grip to fit the individual hand size and comes with two sizes of backstraps in two different shapes. 

The backstraps are easily changed and secured to the frame with a single pin offering the following options: a short frame (SF) version, a medium (M) and a large (L) version. 

The medium and the large version can be chosen with or without beavertail, the beavertail backstraps keeping large hands clear of the slide.

The short frame (SF) version without any backstraps mounted still remains a complete fully functional frame. Its dimensions are smaller than previous generations.
Gen4 backstraps - measurement
108 degree angle

Ergonomic design

The grip angle of the GLOCK Safe Action® pistol remains unchanged even when modifying the backstraps.

How to install the backstrap of a GLOCK Gen4 pistol:

Remove trigger housing pin

Step 1

Remove the trigger housing pin.
Remove GLOCK backstrap

Step 2

Remove the GLOCK backstrap, if it is mounted.
Hook backstrap to lower backside of the frame

Step 3

Hook the backstrap to the lower backside of the frame, then push its top towards the frame.
Install housing pin

Step 4

Install the corresponding trigger housing pin.

Available models

GLOCK Gen4 pistol models are available in caliber 9mm Luger, 40 S&W, 10mm Auto, 45 Auto and 357 SIG and different sizes