The Orthos Arms Raider S4 is a semi-automatic 12 gauge shotgun with an 18.5-inch barrel and a 3-inch chamber. It has a 6+1 round capacity and comes with an adjustable synthetic stock in a woodland camo finish. The M-LOK forend allows for accessory attachment. 
 

Key Specifications 

• Brand: Orthos Arms 
• Model: Raider S4 
• Caliber: 12 Gauge 
• Action: Semi Auto 
• Capacity: 6+1 
• Barrel Length: 18.5 in 
• Color/Finish: Woodland Camo 
   

Detailed Features 

• 18.5-inch barrel with 3-inch chamber 
• Adjustable synthetic stock for fit customization 
• M-LOK compatible forend for accessory mounting 
• Woodland camo finish on synthetic furniture 
• 6+1 round capacity

Owners of the Raider S4 tend to appreciate its tactical layout paired with the woodland camo finish, which gives it a distinct look compared to all-black competition. The adjustable stock gets consistent positive mention for accommodating different shooters without any tools.

Reliability with standard 12 gauge loads is generally regarded as good, though some owners note that light target loads can cause short-cycling until the gun is broken in. The M-LOK rail section is seen as a practical addition for those who want to mount a light or foregrip.

On value, the Raider S4 sits in a competitive segment and opinions split on whether the camo finish justifies the price premium over plainer tactical shotguns. The trigger is functional but not praised, and a small number of owners mention that the stock adjustment can loosen over extended use.