The EAA Corp Girsan MC312 is a 12-gauge semi-automatic shotgun with an inertia-driven action and a 28-inch vent rib barrel. Chamber size is 3.5 inches. Capacity is 5 rounds. Overall length is 50 inches, length of pull is 14.25 inches, weight is 9.3 lbs. The receiver is aluminum, stock is synthetic with a camo finish. A high-visibility front sight aids acquisition. The transfer bar safety prevents accidental discharges. 
 

Key Specifications 

• Model: MC312 
• Gauge: 12 GA 
• Barrel Length: 28 inches 
• Weight: 9.3 lbs. 
• Capacity: 5 rounds 
• Chamber Size: 3.5 inches 
• Action Type: Semi-Automatic (Inertia) 
• Receiver Material: Aluminum 
• Stock Material: Synthetic 
• Stock Finish: Camo 
• Length of Pull: 14.25 inches 
• Overall Length (OAL): 50 inches

The Girsan MC312 lands mostly positive reviews for its price point. The inertia-driven action is the most praised feature -- it cycles cleanly through most hunting loads and keeps the action simple and easy to maintain. The camo finish works well in the field. Users generally find it comfortable to carry given its size.

The main criticisms are about build quality relative to higher-end inertia shotguns; some components feel cheaper by comparison. A handful of users report cycling issues with lighter target loads, which is common with inertia systems. New shooters occasionally mention a learning curve. The consensus is a good value entry-level semi-auto shotgun for hunting and casual sport use, but not a substitute for a Benelli at twice the price.