The Glock Competition Guns: 9mm, 40 S&W, 45 ACP, 10mm

Here are the four most commonly used long slide Glock competition choices compared to each other. Each are long slides, some are Gen 4 but some are Gen 5. One of these is not strictly a "competition" pistol, but all four of these handgun choices are commonly used in competitions, at least in GSSF.