The Mossberg 930 Slugster is a gas-operated semi-automatic shotgun in 12 GA with a 24-inch fully rifled barrel and a matte blued finish. The gas system is self-regulating, cycling both light field loads and heavier magnum rounds without adjustment. 
 

Key Specifications 

• UPC: 015813852326 
• Gauge: 12 GA 
• Capacity: 5 ROUNDS (4+1 with magazine) 
• Barrel Length: 24 INCHES 
• Weight: 7.5 LBS. 
• Finish: Matte Blued 
   

Detailed Features 

The fully rifled barrel is specifically designed for slug ammunition, delivering the tight patterns and extended accurate range that a smooth bore can't match. A cantilever scope base is built into the barrel, so scope mounting doesn't require an additional barrel-mounted rail. Adjustable stock spacers let you dial in length of pull without tools. The self-regulating gas system reduces felt recoil compared to fixed-system semi-autos and keeps cycling consistent across different loads.

Owners of the Mossberg 930 Slugster rate it well for deer hunting and close-range defensive use. The semi-automatic action with the rifled barrel combination is the main draw, and most users report that accuracy with slugs at hunting distances is solid. The stock adjustment and comfortable ergonomics come up favorably.

On the critical side, the weight — 7.5 lbs. — can feel like a lot after a full day of carrying. Some users report a break-in period before the cycling smooths out. Occasional feeding issues with specific ammunition types are mentioned, though these tend to be resolved with quality hunting loads. The community is active in sharing maintenance tips and recommended optics for the cantilever mount.