The Mossberg 590A1 Professional is a pump-action shotgun in 12 Gauge with a 20-inch barrel, 3-inch chamber, and Tungsten Gray Cerakote finish. The receiver is drilled and tapped steel. Capacity is 8+1. 
 

Key Specifications 

• Brand: Mossberg 
• Model: 590A1 Professional 
• Caliber: 12 Gauge 
• Action: Pump Action 
• Capacity: 8+1 
• Barrel Length: 20 in 
• Color/Finish: Tungsten Gray Cerakote 
   

Detailed Features 

• 20-inch barrel with Tungsten Gray Cerakote finish 
• Drilled and tapped steel receiver 
• 3-inch chamber 
• Black stock 
• Corncob-style forend

The 590A1 Professional draws strong approval from owners who want a pump shotgun with provisions for accessories. The drilled and tapped steel receiver gets specific praise for enabling direct optic and accessory mounting, something owners of the base 590A1 note they have to work around. Most find the Tungsten Gray Cerakote finish holds up well in wet conditions.

The corncob-style forend splits opinion. Some owners find the texture ideal for a positive grip and leave it in place; others swap it out for a smoother alternative within weeks of purchase. The fixed black stock prompts the same adjustable-vs-fixed debate that follows most 590 variants, with users divided on whether the simplicity is a feature or a limitation.

Value debate on the Professional centers on whether the combination of Cerakote finish, drilled receiver, and upgraded forend justifies the premium over the base 590A1. Those who specifically need the tapped receiver find it worthwhile. Others note the core pump-action function is identical to the less-expensive model and question the price difference.