A Glock 23 pistol chambered in .40 S&W can be adapted to fire 9mm ammunition using an aftermarket barrel manufactured by a specific company known for its affordable firearm components. This allows owners to practice with the less expensive and more readily available 9mm cartridge while maintaining the familiar platform. Typically, such a change requires only a barrel swap and the use of compatible 9mm magazines.
Adapting a .40 S&W pistol to 9mm offers several potential advantages. Lower ammunition costs can facilitate more frequent practice, leading to improved proficiency. Reduced recoil with 9mm can also enhance control and accuracy, especially for newer shooters. This conversion provides flexibility in ammunition choice, particularly during times of ammunition scarcity or price fluctuations. Historically, caliber conversions have been a popular way for firearm owners to maximize the utility of their existing handguns.