The Panzer Arms FS1 Pro is a semi-automatic shotgun chambered in 12 Gauge with a 20-inch barrel. It has a folding stock design and is listed with 4-round base capacity and 7-round extended capacity, finished in Flat Dark Earth and black. 
 

Key Specifications 

• Brand: Panzer Arms 
• Model: FS1 Pro 
• Caliber: 12 Gauge 
• Action: Semi Auto 
• Capacity: 4 / 7 rounds 
• Barrel Length: 20 in 
• Color/Finish: Flat Dark Earth / Black 
   

Detailed Features 

• Pro folding semi-automatic configuration 
• 20-inch barrel 
• Flat Dark Earth and black two-tone finish 
• 4-round standard capacity with 7-round extended option 
• Compact folding stock design

FS1 Pro owners gravitate to the folding stock configuration for storage flexibility and the tactical aesthetic. The FDE and black finish combination is consistently called out as sharp-looking, and the 20-inch barrel keeps the overall package manageable.

Function draws split reviews. When it runs, owners describe the semi-automatic action as smooth for the price. However, a portion of owners report early cycling issues with lighter loads, and a small number note the folding mechanism requires a firm lockup to ensure reliable deployment. These concerns tend to surface in the first few boxes of shells.

Value-wise, the FS1 Pro is priced as a budget-friendly entry into the folding semi-auto shotgun category. Buyers who understand that going in typically rate it positively. Those who compare it directly to mid-tier or premium guns often find the finish and internal tolerances reflect the lower price point.