The Benelli M3 is a 12-gauge shotgun that runs in both pump and semi-automatic modes, which is its defining feature over standard pump guns. It holds 5+1 rounds, has a 19.75-inch barrel, and weighs 7.2 lbs with a black finish. 
 

Key Specifications 

• Model: M3 
• Gauge: 12 GA 
• Action: Pump Action / Semi-Automatic 
• Capacity: 5 Rounds (+1) 
• Barrel Length: 19.75 inches 
• Weight: 7.2 lbs. 
• Finish: Black 
   

Detailed Features 

The dual-mode action is the core of this platform. Pump mode gives manual control over cycling, useful when running reduced-power loads that might not cycle a semi-auto reliably. Semi-auto mode lets the gun handle cycling automatically with standard loads, which speeds up follow-up shots. 
 
At 19.75 inches the barrel keeps the gun maneuverable in confined spaces without sacrificing too much of the sight radius. Ghost ring sights help with target acquisition in low-light conditions. The pistol grip design gives steady control during repeated firing. 
 

Usage Scenarios 

The M3 works for home defense, where the ability to switch modes means it can handle a wider range of ammunition. For sport shooting it cycles reliably with standard loads in semi-auto mode. The adjustable operating mode also makes it useful for range sessions mixing different ammunition types.

The Benelli M3 draws clear appreciation for its dual pump/semi-auto capability. That flexibility is the most frequently cited strength -- it opens up ammunition choices that a dedicated semi-auto might not handle reliably.

Build quality and durability get consistent positive marks, and the ergonomics hold up well through extended range sessions. Cycling with different ammunition types is generally reliable, which owners appreciate.

Weight and bulk come up as real considerations. At 7.2 lbs it is manageable, but some shooters find it heavier than alternatives for prolonged carry or quick handling in tight spaces. Price is the other recurring point -- the M3 sits above simpler pump-only options, which leads to honest discussion about whether the dual-mode capability is worth the cost difference for a given use case.