The Glock G34 Gen3 is a full-size competition-oriented 9mm pistol with a 5.3-inch barrel and adjustable rear sights. The longer barrel and slide give it an extended sight radius compared to standard-length Glocks, which translates to improved precision at distance. At approximately 25.77 oz. it handles well for extended range sessions. The Safe Action system includes trigger, firing pin, and drop safeties. 
 

Key Specifications 

• Brand: Glock 
• Model Name: G34 Gen3 Competition 
• Caliber: 9MM Luger (9x19 Para) 
• Capacity: 17 Rounds (+1 in the chamber) 
• Barrel Length: 5.3 inches 
• Weight: approximately 25.77 oz (1.6 lbs) 
• Finish: Black Matte 
• Action Type: Safe Action (striker fired) 
• Sights: Adjustable 
   

Detailed Features 

• Extended Barrel: The 5.3-inch barrel improves sight radius and velocity versus compact or standard Glock models. 
   
• Adjustable Sights: The rear sight can be adjusted for windage and elevation, which is useful when setting up for competition or when running a specific load. 
   
• Ergonomic Grip: Finger-grooved polymer grip with black texture. Gen3 has fixed backstraps. 
   
• Safe Action System: Three independent safeties (trigger, firing pin, drop) engage and disengage automatically during the firing cycle.

The G34 Gen3 is widely regarded as one of the better factory competition pistols in 9mm. The extended barrel and sight radius are the most commonly praised attributes; competitive shooters note that the longer sight radius makes a tangible difference in shot-to-shot consistency.

Reliability is rarely questioned. Glock's reputation holds here, and users report the G34 functions across a range of ammunition including light competition loads.

The adjustable sights draw positive feedback from shooters who tune their setup for specific distances or loads. The platform's broad aftermarket support (triggers, sights, grips) is frequently mentioned as a reason to choose it over more specialized race guns.

Weight comes up in the context of extended carry. The G34 is sized for competition or open carry rather than concealment, and some shooters find it heavy for that purpose compared to lighter competition-focused pistols. Certain experienced competitive shooters also note that dedicated race guns offer features the G34 doesn't match.

The trigger, like most stock Glock triggers, is described as consistent rather than exceptional. Most competitors end up swapping it for an aftermarket unit.

Overall, the G34 Gen3 is seen as a capable, adaptable competition platform with a depth of aftermarket support that keeps it competitive.