ar-15 for Dummies
When early Lugers have been chambered in seven.65x21mm, a .thirty caliber rimless bottleneck cartridge also invented by Herr Luger, military consumers ended up hungry for a round with a little bit extra umpf. This resulted in a fatter, 9mm bullet on the shorter, 19mm very long circumstance that simultaneously labored better during the Luger pistol.