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GLOCK 20 Gen4

The GLOCK 20 Gen4 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. The Modular back strap system makes it possible to instantly customize its grip to accommodate any hand size. The reversible magazine catch makes it ideal for left and right-handed shooters

Caliber graphic
  • Caliber 10 mm Auto
3 safeties system graphic
  • System Safe action
Magazine capacity graphic
  • Mag. Capacity Standard: 15
Barrel length graphic
  • Barrel Length 117 mm | 4.61 inch
Weight without magazine graphic
  • Weight without magazine 780 g | 27.51 oz
Weight with empty magazine graphic
  • Weight with empty magazine 870 g | 30.69 oz
Weight with loaded magazine graphic
  • Weight with loaded magazine* 1130 g | 39.86 oz
Trigger pull graphic
  • Trigger Pull** 28 N
Muzzle velocity and muzzle energy graphic
  • Muzzle velocity* 314 m/s | 1030 fps
Muzzle velocity and muzzle energy graphic
  • Muzzle energy* 574 J | 423 ft lb

* depending on the ammunition used / ** depending on configuration


1 Length (Overall)* 205 mm | 8.07 inch
2 Slide Length (cpl.) 193 mm | 7.60 inch
3 Width (Overall) 34 mm | 1.34 inch
4 Slide Width 28,5 mm | 1.12 inch
5 Height incl.Mag. 140 mm | 5.51 inch
6 Sight radius (Polymer) 172 mm | 6.77 inch
Sight radius (Steel) 171 mm | 6.73 inch
Sight radius (GNS) 170 mm | 6.69 inch
7 Trigger Distance* 72,5 mm | 2.85 inch

* FOR GEN4/GEN5 MODELS, G19X, G45: Check out the Gen5, Gen4, G19X and G45 Technology area for medium/large backstraps. 

Technical Data are rounded and do not reflect tolerances – they may be altered without notice! Subject to technical changes.

Some magazines might not be available in all countries due to legal regulations.

GLOCK Accessories