The Four Peaks AKSA S4 is a semi-automatic shotgun chambered in 12 GA, built for sport shooting, hunting, and self-defense. The tungsten finish and 18.5" barrel keep the package compact and the profile clean. 
 

Key Specifications 

• Manufacturer: Four Peaks 
• Model: AKSA S4 
• Type: Semi Automatic Shotgun 
• Caliber: 12 GA 
• Barrel Length: 18.5 inches 
• Capacity: 5 rounds 
• Weight: 8.3 lbs. 
• Finish Color: Tungsten 
• Condition: New in Box 
   

Detailed Features 

• Gas Piston Operation: Reduces recoil and cycles shells reliably, which helps with faster follow-up shots. 
   
• Proof Tested Barrel: 4140 steel with chrome plating — durable, wear-resistant, and consistent. 
   
• Ghost Ring Sights & Picatinny Rail: Ghost ring sights for quick acquisition; the Picatinny rail accepts optics or tactical accessories. 
   
• 7075-T6 Billet Aluminum Receiver: High strength-to-weight material that keeps overall weight reasonable. 
   

Usage Scenarios 

1. Sport Shooting — Ghost ring sights and the gas piston system work well on the range where split-second follow-up shots matter. 
    
2. Hunting — The gun accepts both 3" and 2¾" shells, which adds load flexibility across different game. 
    
3. Home Defense — Semi-auto action with 12 GA stopping power in a short, manageable package.

Owners of the AKSA S4 Tungsten generally like it, with a few consistent reservations worth knowing about.

On the positive side, the lightweight build and easy handling come up often. Shooters at different experience levels find the semi-auto action smooth and reliable, and recoil is described as manageable for a 12 GA. The tungsten finish holds up well to regular use, and most agree the materials feel solid.

The recurring complaints center on ammunition compatibility — some loads and brands don't cycle cleanly, so it pays to test a few options before settling on a carry or defense round. Price is another discussion point; most buyers feel it's fair for the feature set, but a handful think the market has comparable options at lower prices.

On balance, the AKSA S4 earns good marks from people who prioritize performance and build quality, with the ammo compatibility issue being the main thing to vet before buying.