Which Glock pistol is best for a competition shooter?
This is a broad question and depends on the sport and division. I’d recommend a Glock 17 (9mm) for most applications. A Glock 17 can be competitive in just about every practical or steel competition and 9mm ammo is less expensive and is easy to shoot. I’ve fired several models in competition and still use a 17, 19 (9mm) and 21SF (.45 ACP) on occasion but I prefer the Glock 34 (9mm) and Glock 35 (.40) pistols for most of the sports I compete. Teamglock.com has some good pistol info with all the specifications to help someone make a decision.