The Beretta M9A4 is a DA/SA semi-automatic pistol chambered in 9mm Luger with a 5.1-inch threaded barrel, optic-ready slide, tritium front and rear night sights, Picatinny rail, and Flat Dark Earth Cerakote finish on carbon steel. It holds 10+1 rounds and weighs 33.4 oz. 
 

Key Specifications 

• Model: M9A4 
• Caliber: 9mm Luger (9x19 Para) 
• Action: Double/Single Action (DA/SA) 
• Capacity: 10+1 rounds 
• Barrel Length: 5.1 inches (threaded 1/2x28) 
• Overall Length: 8.7 inches 
• Weight: 33.4 oz (2.1 lbs) 
• Finish: Flat Dark Earth Cerakote 
• Frame Material: Carbon Steel 
• Grip Material: FDE Textured Polymer (Vertec Thin Straight) 
• Sights: Tritium Front and Rear Night Sights 
• Safety Features: Decocker only 
   

Detailed Features 

The threaded barrel (1/2x28) lets you attach a suppressor or compensator without a gunsmith. The optic cut on the slide accepts a red dot directly. A three-slot Picatinny rail on the frame supports lights and lasers. Tritium night sights provide a reliable three-dot sight picture in low light without batteries. The Vertec Thin Straight grips reduce grip diameter compared to standard M9 grips, which helps shooters with shorter fingers reach the trigger more naturally. The Flat Dark Earth Cerakote on carbon steel is durable and corrosion resistant. The decocker-only configuration drops the hammer safely without engaging a manual safety. 
 

Usage Scenarios 

1. Home Defense: The tritium sights and decocker make it well-suited for low-light defensive use with quick first-shot access. 
2. Competitive Shooting: The optic-ready slide and threaded barrel support competition setups. 
3. Tactical Training: The Picatinny rail, optic compatibility, and suppressor thread cover specialized training requirements.

The M9A4 Gen 4 in FDE draws consistent praise from Beretta fans and from shooters who specifically want the M9 platform with modern additions. The build quality and reliability that define the M9 lineage carry forward here. The threaded barrel and optic-ready slide are specifically called out as features that make this more practical than earlier M9 variants for users who run suppressors or red dots.

Accuracy gets strong marks out of the box, and the smooth DA/SA trigger action is appreciated by shooters already familiar with the system. The ergonomic improvement from the Vertec thin grips gets positive mention from those with smaller hands.

The weight at 33.4 oz is the most common critique for daily carry use, and comparisons with lighter polymer-framed striker-fired pistols come up regularly. The DA/SA action is simply not the preference of everyone who grew up on striker-fired guns, and that accounts for some of the mixed trigger feedback. The price sits higher than comparable DA/SA pistols from some other manufacturers, which generates value discussions. Overall, buyers who want the M9A4 specifically tend to be satisfied with it.