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GLOCK 21C Gen4

Remarkable for its accuracy and light recoil, the GLOCK 21C Gen4 delivers the legendary stopping power of the 45 Auto round with a high magazine capacity. It has an integral parallel port compensation system which not only reduces muzzle flip and felt recoil, it also aids in quicker follow-up shot target acquisition. The modular back strap system makes it possible to instantly customize the grip to accommodate any hand size. The reversible magazine catch makes it ideal for left and right-handed shooters.

Caliber graphic
  • Caliber 45 Auto
3 safeties system graphic
  • System Safe action
Magazine capacity graphic
  • Mag. Capacity Standard: 13
Barrel length graphic
  • Barrel Length 117 mm | 4.61 inch
Weight without magazine graphic
  • Weight without magazine 740 g | 26.10 oz
Weight with empty magazine graphic
  • Weight with empty magazine 825 g | 29.10 oz
Weight with loaded magazine graphic
  • Weight with loaded magazine* 1095 g | 38.63 oz
Trigger pull graphic
  • Trigger Pull** 28 N
Muzzle velocity and muzzle energy graphic
  • Muzzle velocity* 240 m/s | 787 fps
Muzzle velocity and muzzle energy graphic
  • Muzzle energy* 430 J | 317 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) 177 mm | 6.97 inch
Sight radius (Steel) 176 mm | 6.93 inch
Sight radius (GNS) 175 mm | 6.89 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