The EAA Girsan MC312 is a 12-gauge semi-automatic shotgun with a black polymer stock and inertia operating system. The 28" barrel, 50" overall length, and 5-round capacity make it a straightforward field and range option. The inertia system cycles rounds quickly with minimal maintenance compared to gas-operated alternatives. 
 

Key Specifications 

• Model: Girsan MC312 
• Caliber: 12 GA 
• Barrel Length: 28 inches 
• Capacity: 5 rounds 
• Overall Length: 50 inches 
• Finish Color: Black 
   

Detailed Features 

The inertia system provides faster cycling with less fouling accumulation than gas designs. The polymer stock and forend keep weight down. Screw-in choke tubes let you adjust shot spread for different applications. A vent rib barrel aids sight alignment, and a high-visibility front sight improves target acquisition in lower light. A rubber butt pad adds shooting comfort. The rotating bolt mechanism provides consistent shell ejection.

The Girsan MC312 gets good marks for its price relative to performance, particularly from buyers looking for a budget-friendly inertia-operated semi-auto.

Owners frequently cite the smooth cycling and reduced felt recoil from the inertia system as real advantages over similarly-priced gas guns. Build quality is generally described as solid for the price point. The versatility across hunting, sport shooting, and general field use is commonly praised.

Some owners note cycling issues with certain lighter loads -- the inertia system typically prefers standard or heavier shells. Weight is occasionally mentioned as on the higher side for extended carries. Aftermarket parts and accessories are more limited than for established brands.