The Mossberg 835 UltiMag Waterfowl is a 12-gauge pump-action shotgun built for the demands of waterfowl hunting. It chambers shells up to 3.5 inches, handles 5+1 rounds, and comes dressed in Mossy Oak Shadow Grass Blades camo on a synthetic stock. 
 

Key Specifications 

• Brand: Mossberg 
• Model Name: 835 UltiMag Waterfowl 
• Gauge: 12 Gauge 
• Chamber Size: 3.5" 
• Action Type: Pump Action 
• Capacity: 5+1 Rounds 
• Barrel Length: 28 inches (Vent Rib, Ported) 
• Overall Length: 48.75 inches 
• Weight: 7.75 lbs 
• Sights: Fiber Optic Front 
• Stock Material: Synthetic with Mossy Oak Shadow Grass Blades Camo Finish 
   

Detailed Features 

 
The Accu-Mag choke system lets you swap chokes without tools, useful when conditions change mid-hunt. Fiber optic front sight improves visibility at first light when birds are moving. The ported vent rib barrel helps manage recoil from the heavier 3.5-inch loads this gun is designed to handle. 
 
At 7.75 lbs it is on the heavier end for a field gun, which most waterfowlers accept as a fair trade for the reduced felt recoil on magnum shells. 
 

Target Audience 

Hunters who specifically need a dedicated waterfowl gun able to handle 3.5-inch shells. Works equally well for new hunters learning the sport and experienced waterfowlers who want a proven platform. 
 

Usage Scenarios 

Best suited to duck and goose hunting from a blind or walking marshes. The camo finish aids concealment. The 28-inch barrel and ported rib make follow-up shots on crossing birds more manageable than with an unported gun.

Waterfowlers generally like the 835 UltiMag for its straight-ahead reliability in wet, muddy conditions. The camo pattern gets specific mentions for working well in marsh and field environments.

The 3.5-inch chamber and Accu-Mag choke system are the features most often called out as genuinely useful rather than marketing checkboxes. Owners running it through multiple seasons typically report no serious reliability issues.

The two most common criticisms are weight and recoil. At 7.75 lbs it is not a light gun, and some hunters find extended carry tiring. Recoil on full 3.5-inch loads is noticeable compared to lighter guns in the same category, and a handful of owners recommend aftermarket pads for longer sessions.

Overall the reception is favorable, with most discussion centered on real-world waterfowl performance rather than aesthetics.