To many Americans, there is only one caliber for a personal defense handgun and that's the .45 Auto. GLOCK acknowledged that sentiment with the development of the GLOCK 21. For law enforcement applications, the magazine capacity is 13 rounds and that's almost twice what's normally carried in the 1911 pistol of military fame and legend. To those who believe that personal defense starts with the numbers "4" and "5" (and in that order) the GLOCK model 21 has been the answer to their prayers.
Caliber: .45 Auto
Action: Safe Action System
Length (slide): 7.59 in., 193 mm
Height: 5.47 in., 139 mm
Width: 1.27 in., 32.5 mm
Length between sights: 6.77 in., 172 mm
Barrel length: 4.60 in., 117 mm
Barrel rifling: right, octogonal
Length of twist: 15.75 in., 400 mm
Magazine capacity: 10 / 13
Mass
Empty without magazine: 26.28 oz., 745 g
Empty magazine: 3.1 oz., 88 g
Full magazine: 12.0 oz., 340 g
Trigger pull (standard): 5.5 lbs., 2.5 kg
Trigger travel for discharge: 0.5 in., 12.5 mm
Number of safeties: 3
