The Girsan MC312 Tactical is a semi-automatic 12-gauge shotgun distributed by EAA Corp. It has an 18.5-inch barrel, 40-inch overall length, and comes in at 6.75 lbs. with a black synthetic stock. Capacity is 5 rounds, and the barrel uses Mobil Choke tube threading. 
 

Key Specifications 

• Model: Girsan MC312 Tactical 
• Manufacturer: EAA Corp 
• Caliber: 12 GA 
• Barrel Length: 18.5 inches 
• Overall Length: 40 inches 
• Weight: 6.75 lbs 
• Capacity: 5 rounds 
• Finish: Black (synthetic stock) 
• Action Type: Semi-Automatic 
• Choke Type: Mobil Choke Tube Thread 
   

Detailed Features 

The gas-operated semi-automatic action cycles on its own after each shot, which cuts down on the manual work between rounds. At 6.75 lbs. the gun is light enough for extended handling without much strain, while still absorbing 12-gauge recoil adequately. The 18.5-inch barrel is short enough to maneuver indoors but not so short that it sacrifices useful range. The pistol grip stock improves control and makes a consistent cheek weld easier to hold. 
 
Mobil Choke compatibility means you can swap in different choke tubes depending on the ammunition and application — a useful feature to have on a general-purpose shotgun. 
 

Usage 

At 18.5 inches the barrel works well for home defense, where tight hallways are the norm. On clay target ranges or in competition the semi-auto action keeps the gun in play with less downtime between shots. For small-game hunting the light weight and choke flexibility give it enough versatility to fit different scenarios.

The MC312 Tactical draws a pretty consistent picture from owners. The price-to-performance ratio comes up most often — it cycles a wide range of 12-gauge ammunition reliably once it's been properly broken in, and that reliability at this price point is what owners keep coming back to.

Handling gets positive marks. The lightweight build and ergonomic grip make it comfortable to run for extended sessions, and owners note it doesn't fatigue the way heavier shotguns can.

The break-in period is a recurring caveat. Several users mention inconsistent cycling early on that smooths out after a few hundred rounds. It's not a universal complaint, but it shows up often enough to be worth noting before the first range session.

Quality control gets mixed feedback. Most units come through fine, but there are occasional reports of fit-and-finish issues or minor defects on individual guns. Aftermarket parts availability and manufacturer support are also sometimes compared unfavorably to more established brands, which matters if a component needs replacing down the road.

Overall, owners who went in with realistic expectations generally find it a solid performer for the money. Those who ran into break-in or QC issues were less satisfied, and a few wished for better aftermarket support.