The Smith & Wesson Model 686 Plus Mountain Gun is a double action revolver chambered in .357 Magnum with a 4.13-inch barrel and 7-round capacity. It has a stainless finish and ships with TWG walnut grips. 
 

Key Specifications 

• Brand: Smith & Wesson 
• Model: 686 Plus Mountain Gun 
• Caliber: .357 Magnum 
• Action: Double Action 
• Capacity: 7 
• Barrel Length: 4.13 in 
• Color/Finish: Stainless 
   

Detailed Features 

• Stainless steel construction throughout 
• 7-round cylinder 
• 4.13-inch barrel 
• TWG walnut grips 
• Mountain Gun configuration

Owners of the 686 Plus Mountain Gun describe it as a natural carry revolver for field use. The 4-inch-class barrel is long enough to extract reasonable velocity from .357 Magnum but short enough that it doesn't feel awkward on the hip during extended outdoor trips. The 7-round cylinder is a selling point over the 6-shot alternatives in this frame class.

The stainless finish gets consistent praise for its durability and resistance to light moisture exposure. Some owners swap out the walnut grips for rubber panels to manage recoil when running full-power .357 loads; the wood panels look good but offer less grip under sustained fire. The trigger on the 686 Plus is widely regarded as one of the smoother factory double-action pulls available at this price, though a few owners note their example needed a polish job before it felt right.

The Mountain Gun designation attracts a segment of buyers who want a capable revolver for backcountry carry as a sidearm. Opinions split on whether the stainless finish is the right choice for that role versus a more subdued option, but most agree the 686 Plus platform itself is well suited for the task.