*FOR GEN4/GEN5 MODELS: Check out the Gen5 and Gen4 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.


Remarkable for its accuracy and light recoil, the GLOCK 21 Gen4 delivers the power of the 45 Auto round with high magazine capacity. 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 The Gen4 system is the perfect complement to the 45 Auto caliber cartridge.
.45 Auto
Safe Action®
Standard: 13
Optional: 10
117 mm | 4.61 inch
745 g | 26.28 oz
830 g | 29.28 oz
1100 g | 38.80 oz
28N
*FOR GEN4/GEN5 MODELS: Check out the Gen5 and Gen4 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.





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