 Hawker soon introduced the new Mark IIA Series 2 with either of two wings; one mounting 12 Brownings, the other with four Hispano cannon in the original gun-bays.The first Series 2s, armed with 12 .303 in (7.7 mm) Brownings (four per wing in the original gun-bays and two more in new gun-bays outboard of the landing lights) arrived in October.These Mk IIA Series IIs also featured a new longer propeller spinner and later become the Mark IIB in April 1941.