Mossberg's SA-20 uses a smooth cycling, gas-operated system for a lightweight, soft-shooting shotgun perfect for both hunting and target shooting. This All Purpose Field model has a black synthetic stock with a 14" LOP, 28" vent rib barrel with a matte blued metal finish, and a metal bead front sight. It includes Mossberg International's Sport Set of 5 choke tubes.
| Choke Configuration | Sport-Set |
| FireArm | yes |
| Chamber | 3" |
| Action | Semi-Auto |
| Sights | Bead Front |
| Barrel Length Range | 28" to 28.99" |
| Weight Range | 6 lbs to 6.99 lbs |
| Chokes Included | 5 |
| Capacity | 4+1 |
| Stock Description | Fixed |
| Hand | Right Hand |
| Stock Finish Group | Black |
| Metal Finish Group | Blued/Black |
| Safety | Crossbolt |
| Barrel Description | Vent Rib |
| Weight | 6 lbs |
| Barrel Length | 28" |
| Receiver Description | Blued |
| OAL | 46.50" |
| Gauge | 20 Gauge |
