The Beretta M9A4 Centurion is a 9mm SA/DA pistol built on the M9 platform with modern upgrades: optic cut slide, flat dark earth Cerakote finish, and aggressive textured polymer grips. It holds 15+1 rounds from a 5.1-inch barrel and weighs 2.08 lbs. Three magazines are included. 
 

Key Specifications 

• Brand: Beretta USA 
• Model: M9A4 Centurion 
• Caliber: 9mm Luger (9x19 Para) 
• Action: Single/Double Action (SA/DA) 
• Capacity: 15+1 rounds 
• Barrel Length: 5.1 inches 
• Weight: 2.08 lbs 
• Finish: Flat Dark Earth Cerakote 
• Frame Material: Polymer 
• Slide Material: Steel 
   

Detailed Features 

The optic cut on the slide accepts direct-mount reflex sights without an adapter. The decocker/safety allows you to safely lower the hammer after chambering a round, transitioning the gun to DA mode for the first shot, the standard M9 operating procedure. 
 
The aggressive grip texture on the polymer frame gives better purchase during rapid fire than earlier M9 generations. The FDE Cerakote finish covers both frame and slide for a uniform look and added corrosion protection. 
 
The 5.1-inch barrel is slightly longer than the standard M9's 4.9 inches, adding a modest velocity gain and extending the sight radius. Three 15-round magazines come in the box. 
 

Usage 

The M9A4 Centurion occupies the space between a legacy M9 and a fully modern pistol. It keeps the proven DA/SA action and familiar controls while adding the optics mounting and improved grip that many shooters want today. The platform is widely understood, with broad holster and accessory support. The SA/DA action takes deliberate practice to master the double-action first shot, but once trained it's a reliable system. The 2.08-lb weight is on the heavier side for a full-size polymer-frame pistol, which is worth noting for daily carry.

The M9A4 Centurion draws buyers who appreciate the M9 lineage and want the platform updated for modern use: optics, improved grips, better finish. That audience tends to be satisfied with what they get.

Build quality is consistently praised. Beretta's manufacturing quality is taken as given by M9 veterans, and the Cerakote finish in FDE gets specific positive mentions for both appearance and durability. Accuracy at range distances is frequently highlighted, with shooters reporting tight groups from the 5.1-inch barrel.

The optics-ready cut is the most appreciated upgrade for current buyers. It opens the pistol to red dot use without modification. The decocker operates cleanly and the manual safety works as expected.

Weight is the most common practical complaint. At 2.08 lbs unloaded, it's heavier than competing polymer-frame pistols of similar capacity, which matters for all-day carry. The trigger in DA mode is heavier than most striker-fired triggers, which some shooters find affects their first-shot consistency. Price comes up in value comparisons. The M9A4 costs more than a standard M9 or many competitors, and whether the upgrades justify the premium depends on how much you specifically value the FDE finish and optics cut.