There were two rows of triangular windows in bands around the forward fuselage, behind which sat the optical proximity fuzes for the warhead. The warhead was at the rear of the missile, wrapped around the exhaust pipe of the Magpie rocket. The prodigious warhead had a lethal radius and was triggered either by the proximity fuzes or four contact fuses set on the front of the wings. The outer casing of the warhead was designed to fragment into pieces fired forward in a 50 degree cone.