Sternmeyer SMG-21 (2020)

Sternmeyer SMG-21 is submachine gun Sternmeyer's best entry in the anti-terrorist category, with wide use on C-SWAT teams and PsychoSquads. A heavy duty SMG with a collapsible stock and rugged construction for use in adverse conditions. The standard issue SMG for IEC security guards and IEC Army noncoms. Capable of firing in single shot from a closed bolt for accuracy or in three-round burst or full auto from open bolt for firepower. Unlike other open bolt designs, such as the Minami, the Sternmeyer does not have a fixed firing pin. When fired single shot from closed bolt the WA rises to 0. The gun also has mountings for an optical sight for use in the single shot mode. A tough and versatile weapon at a good price.

Source

 * Cyberpunk 2020, pg.61,62
 * Corporation Report 2020 Volume 1, pg.67
 * Blackhand's Street Weapons, pg.20