The Glock G45 Gen5 is a 9mm Luger pistol built on a compact frame with a full-size slide. It runs a striker-fired action, carries 17+1 rounds, and weighs 1.6 lbs (30.34 oz). The 4.02-inch Glock Marksman Barrel uses polygonal rifling for consistent shot placement. Three passive safeties (trigger, firing pin, and drop) are built into the mechanism with no manual safety lever required. 
 

Key Specifications 

• Model: Glock G45 Gen5 
• Caliber: 9mm Luger (9x19 Para) 
• Barrel Length: 4.02 inches 
• Capacity: 17 rounds +1 
• Weight: 1.6 lbs (30.34 oz) 
• Action Type: Striker Fired 
• Frame Material: Black Polymer 
• Safety Features: Trigger safety, firing pin safety, drop safety 
   

Detailed Features 

• Glock Marksman Barrel (GMB): Polygonal rifling improves accuracy and is easier to clean than conventional lands-and-grooves. 
• Fixed Sights: Front and rear sights for fast target acquisition. 
• Interchangeable Backstraps: Three sizes allow grip customization for hand fit. 
• Flared Mag-Well and Front Slide Serrations: The flared mag-well speeds reloads; front serrations aid press-checks and chamber confirmation. 
   
  The nDLC slide finish resists corrosion and wear. The compact frame dimensions make it manageable for concealed carry while retaining a 17-round magazine. It works equally well as a home defense pistol or as a competition-ready handgun with minor aftermarket additions.

Owners of the Glock G45 Gen5 9mm point to accuracy as a consistent strength. Shot placement is predictable and tight groups come naturally once the shooter is familiar with the trigger, which suits both new and experienced users.

Reliability is a near-universal talking point. The G45 runs cleanly across different conditions and ammunition types, which reinforces Glock's reputation for consistent function.

Ergonomics get good marks. The grip texture and interchangeable backstraps let shooters fit the pistol to their hand, and many find it comfortable over long sessions.

The 17-round capacity and compact frame combination is frequently highlighted as a strength for concealed carry and home defense. Aftermarket support is extensive, and owners enjoy being able to add sights, triggers, and other accessories without hunting for parts.

Price is the main area of debate. Some consider it good value given the features and reliability; others argue that competitors offer comparable performance for less. Trigger feel divides opinion too, with some finding it smooth out of the box and others preferring an aftermarket upgrade.