The International Firearms Corporation 20GSA3 is a gas-operated semi-automatic shotgun chambered in 20 GA with a 3-inch chamber. It has a 28-inch barrel, a 4+1 round capacity, and weighs 6.9 lbs. The stock and forend are black synthetic. 
 

Key Specifications 

• Manufacturer: International Firearm Corporation 
• Model: 20GSA3 
• Action Type: Semi-Automatic 
• Caliber/Gauge: 20 GA 
• Barrel Length: 28 inches 
• Chamber Size: 3 inches 
• Capacity: 5 rounds (4+1) 
• Weight: 6.9 lbs. 
• Finish Color: Black 
• Stock & Forend Material: Synthetic 
   

Detailed Features 

The gas-operated action reduces felt recoil compared to inertia-driven designs, which helps with follow-up shots on fast-moving targets. Three interchangeable chokes (Full, Modified, Cylinder) let you adjust the pattern for clay shooting or field work. The crossbolt safety is straightforward to operate. The synthetic stock handles wet field conditions without warping or swelling.

Owners of the International Firearms 20GSA3 are generally satisfied, with reliability and versatility as the most common positives.

The gas system gets consistent praise for smooth cycling across a range of ammunition types. Users note it feeds target loads and heavier hunting shells without issues, which matters for a shotgun used across multiple purposes. The 20 gauge is lighter on recoil than 12 gauge, and the 6.9 lb weight keeps the gun manageable for smaller-framed shooters.

Build quality feedback is positive for the price range. Owners find the construction solid and the ergonomics comfortable for extended use.

The main negative that comes up is an initial break-in period where some users experienced occasional feeding hiccups with lighter loads. Most report this clears up after a few hundred rounds. The 20GSA3 sits in a competitive price bracket and most buyers feel it outperforms other options they considered at the same cost.