The Mossberg SA-20 Bantam is a semi-automatic 20-gauge shotgun built with a shorter length of pull and 5.5 lb weight, aimed at youth shooters and smaller-framed adults who want a functional field gun without the bulk of a full-size platform. The 24-inch vent rib barrel provides a sighting plane for target acquisition, and the 4+1 capacity covers most upland hunting and range shooting needs. 
 

Key Specifications 

• Gauge: 20 GA 
• Action: Semi-Automatic 
• Capacity: 5 Rounds (4+1) 
• Barrel Length: 24 inches 
• Weight: 5.5 lbs 
• Chamber Size: 3 inches 
• Sights: Bead Front 
• Stock Material: Synthetic (Black) 
• Receiver Material: Steel 
   

Detailed Features 

 
The semi-automatic action allows follow-up shots faster than a pump, which matters when birds are flushing or multiple targets appear at the range. The crossbolt safety is positioned for easy reach, and the synthetic stock holds up to rain and rough handling without needing maintenance. The matte blued finish on the receiver and barrel resists corrosion during field use.

The Mossberg SA-20 Bantam gets consistently positive marks from parents and instructors running youth shooting programs, and from smaller-framed adults who find most shotguns awkward to mount. The shorter length of pull is the main differentiator and it works as advertised.

Cycling reliability draws the most praise -- owners report the SA-20 runs smoothly with a range of 20-gauge loads once broken in. Some users note occasional failures to cycle with light target loads during the initial break-in period, which typically clears up after 50-100 rounds. The semi-auto action and 20-gauge recoil combine to make follow-up shots accessible for newer shooters.

The build feels appropriate for the price -- solid but not refined. Some buyers mention wishing for better materials or a more polished finish, though most accept the trade-off given the SA-20's affordable position in the market. Overall, it's widely recommended as a practical entry-level 20-gauge option.