You can’t go wrong with the 9 mm! Great for men and women alike this round is very versatile and lightweight. The popularity of this cartridge can be attributed to the widely held conviction that it is effective in police and self-defense use, as well as its relatively light carry, low cost and wide availability. Popular firearms that use this round include the Glock 17, Glock 19, Glock 26, Beretta 92, Sig Sauer 226 and so many more!