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. Compensated/ported for excellent controllability.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. The magazine capacity is 10 rounds.
