A-0/U1 Armament of 4 x MG 17, two in wing roots and two above the engine. A-0/U2 Armament of 2 x MG 17 above the engine, 2 x MG 131 in wing roots. A-0/U3 Fitted with FUG 25 radio equipment. A-0/U4 Fitted with 300 litre drop tank. A-0/U5 Armament of 2 x MG 17 above the engine, 2 x MG 151 in wing roots. A-0/U6 Fitted with American Wright Cyclone engine. Proposal only. A-0/U7 Fitted with early BMW 801D engine. A-0/U8 Fitted with composite BMW 801C/D engine. A-0/U9 Fitted with BMW 801C-1 but work abandoned. A-0/U10 Armament of 2 x MG 17 above the engine, 2 x MG 151 in wing roots, 2 x MG FF-C2 in outer wings. A-0/U11 BMW 801C-1 fitted in place of BMW 801C-0. New undercarriage design. A-0/U12 Fitted with BMW 801C-1 with GM-1 nitrous oxide injection. Fw 190A-1 A-1/U1 Either a BMW 801D test machine or fitted with mountings for up to eight SC 50 bombs.