The SM31b is a high-quality Shotgun, well suited for most types of duty. It used to be the first training weapon for Omni-Pol recruits. This variation uses Promtitude Sputter Bay technology, and the 31b addresses a problem with the 31, where the bay walls proved to be too thin to allow the gun to be fired at full PSB force.

The SM31b is a high-quality Shotgun, well suited for most types of duty. It used to be the first training weapon for Omni-Pol recruits. This variation uses Promtitude Sputter Bay technology, and the 31b addresses a problem with the 31, where the bay walls proved to be too thin to allow the gun to be fired at full PSB force.