The Glock G34 Gen 3 is a semi-automatic 9mm pistol with a 5.31-inch barrel, polymer frame, and adjustable 3-dot sights. The extended barrel and slide increase sight radius over standard Glock 17 dimensions, improving precision for competition and target shooting. It ships with 10-round magazines. Three integrated safeties (trigger, firing pin, and drop) operate automatically during the firing cycle. 
 

Key Specifications 

• Brand: Glock 
• Model: G34 Gen 3 
• Caliber: 9MM Luger (9x19 Para) 
• Action: Safe Action (striker fired) 
• Capacity: 10+1 rounds 
• Barrel Length: 5.31 inches 
• Overall Length: 8.82 inches 
• Weight: 25.77 oz (approximately 2.1 lbs) 
• Frame Material: Polymer 
• Finish Color: Black 
• Sights Configuration: Adjustable 3-Dot 
   

Detailed Features 

1. Extended Barrel: The 5.31-inch barrel delivers a longer sight radius and marginally better velocity than the standard G17 length. 
    
2. Three Integrated Safeties: Trigger, firing pin, and drop safeties work in concert without requiring manual engagement. 
    
3. Finger-Grooved Grip: Textured polymer with contoured finger grooves for a repeatable grip position. 
    
4. Lightweight Polymer Frame: The frame keeps weight at 25.77 oz while maintaining durability under regular use.

The G34 Gen 3 is consistently described as accurate and reliable, the two qualities Glock users value most. The extended barrel is the defining feature in discussions, with most owners noting that the longer sight radius makes a meaningful difference for both competition shooting and precision target work.

The adjustable sights are appreciated by shooters who want to fine-tune their zero for a specific load or distance, and the platform's extensive aftermarket ecosystem means sights, triggers, and grips can all be upgraded without difficulty.

Size and weight come up for carry use. The G34's dimensions are well-suited to competition or home defense but less practical for concealed carry, and some owners note they prefer a compact variant for that purpose.

For IDPA or USPSA competition, the G34 is regarded as a solid choice that doesn't require significant investment to be competitive. The main debate in enthusiast circles is whether its advantages over the G17 justify the added length, which most competition shooters answer yes.