For over 30 years now, Glock has been a household name, and for very good reason: Their excellent reliability, shootability and accuracy has made them a favorite of law-enforcement officers and civilians alike. So how could Glock improve upon their renowned semi-automatic striker-fired Glock 19? With the Gen 4, they show us: improved external ergonomics, including an enlarged magazine release button and interchangeable backstraps, as well as internal tweaks. American Rifleman's Joe Kurtenbach walks you through this latest generation of Glock perfection in today's video.