Dragon 1/35 Sd.Kfz.251/21 Ausf.D DrillingThe SdKfz 251 21, also known as the Mittlerer Schutzenpanzerwagen Drilling MG 151, was a very effective production anti aircraft version of the SdKfz 251 half track. Mounted with three excellent 15mm MG 151 15 or 20mm MG 151 20 machine guns on a compact pedestal behind a small armored shield, having a rate of 700 rounds per minute per gun, these modified SdKfz251 half tracks could provide very effective defensive fire against the Allied aircraft.