The Mossberg 940 Pro Tactical SPX is a semi-automatic shotgun chambered in 12 gauge with an 18.5-inch barrel. It has a 3-inch chamber, a 7-round capacity, black synthetic furniture, and an OD Green Cerakote receiver finish. 
 

Key Specifications 

• Brand: Mossberg 
• Model: 940 Pro Tactical SPX 
• Caliber: 12 Gauge 
• Action: Semi Auto 
• Barrel Length: 18.5 in. 
• Color/Finish: OD Green 
   

Detailed Features 

• 18.5-inch barrel with 3-inch chamber 
• 7-round capacity 
• Black synthetic furniture 
• OD Green Cerakote receiver finish 
• Semi-automatic action

The Mossberg 940 Pro Tactical SPX is a purpose-built tactical shotgun, and owners who buy it typically have a specific use case in mind. The 18.5-inch barrel and 7-round capacity make it compact enough for home defense without sacrificing much on capacity. Reliability across a range of ammunition loads is the most consistent positive report.

The OD Green finish and synthetic furniture are practical and hold up without concern. Cycling is generally reliable, and most owners note the 940 Pro is a step up from earlier Mossberg semi-auto designs in cycling consistency.

The gas system does require some attention to ammunition choice early on, and some owners note that light target loads can cause feeding issues until the gun is broken in. Others report no problems from the first round. It is a common enough note that it is worth flagging, though it does not seem to affect everyone.