2.8-2.0 cm PanzerBuchse 41, 28 x 188 R Squeeze Bore type Gerlich, 28/20 Guerlich, 28/20 Larsen, 28/20 S PzB41, 28/20 Squeeze bore, 28/20 x 187 R, 28/21, 28-20mm Polte-Neufeld Pz.Gr.41