The Mossberg 500 Combo is a 12-gauge pump-action shotgun that ships with two barrels: a 28-inch vent rib field barrel and a 24-inch fully rifled barrel. Capacity is 6 rounds (5+1) with a 3-inch chamber. 
 

Key Specifications: 

• Brand: Mossberg 
• Model Name: 500 Combo Field/Deer 
• Gauge: 12 GA 
• Action Type: Pump Action 
• Barrel Lengths: 
  • 28" Vent Rib Field Barrel 
  • 24" Fully Rifled Barrel 
• Chamber Size: 3" 
• Capacity: 6 rounds (5+1) 
• Overall Lengths: 
  • Adjusts to either 43.50" or 47.50" 
• Weight: Approximately 7.5 lbs (varies slightly by configuration) 
• Sights: Dual Bead / Adjustable Rifle Sights 
• Stock Material/Finish: Synthetic with Mossy Oak Break-Up Country Camo 
   

Detailed Features 

The dual-barrel setup is the practical centerpiece of this combo. The 28-inch vent rib with ACCU-Set choke handles birds and general field work. The 24-inch fully rifled barrel with adjustable rifle sights turns the same receiver into a slug gun for deer season. Swapping barrels takes less than a minute. The top tang safety is easy to access without breaking your grip, and the synthetic Mossy Oak stock handles outdoor conditions without warping or refinishing. 
 

Usage Scenarios 

Hunters who pursue both birds and deer in the same season get real value from the two barrels without buying a second gun. The 12 gauge handles a wide range of loads. The pump action is straightforward under stress.

The Mossberg 500 Combo draws consistent praise for its versatility. The dual-barrel configuration is the main selling point. Hunters appreciate not needing separate guns for birds and deer. Mossberg's pump reliability is cited often, and most owners say the action holds up well season after season.

The Mossy Oak camo is appreciated for blending in different terrain, and the synthetic stock holds up better than wood in wet conditions. The ACCU-Set choke system for the field barrel gets positive mentions for allowing pattern customization.

Critical feedback generally focuses on weight (around 7.5 lbs, which some find heavy for long walks) and recoil with certain heavier loads. A few users mention the finish wearing over time, and some note limited factory accessories for this specific combo. Recoil with heavier slugs is a recurring discussion point for new shooters. Overall, most buyers consider it good value for the two-barrel functionality.