The MK103 on the Fw 190A was known as the /R3 kit.
Source is Joe Baugher's site.
http://www.csd.uwo.ca/~pettypi/elevon/baugher_other/fw190.html#RTFToC1 Fw 190A-5
"Fw 190A-5/U11- attack aircraft with two 30 mm Rheinmetall-Borsig MK 103 cannons mounted in underwing pods; only one plane existed (W.Nr. 151303, RG+ZA). This kind of armament became later standard as Rustsatz 3 (R3) kit. "
Fw 190A-6
"Fw 190A-6/R3 - equivalent to the A-5/U11 model, armament: 2x1 MG 17 machine guns, 2x1 MG 151/20 E and 2x1 MK 103 cannons; not serially produced. "
Fw 190A-7
"Apart from standard A-7 models there were three modification kits (Rustsatz) provided : R1, R2, R3."
Fw 190A-8
"The Fw 190A-8, like previous models, could be equipped with different Rustsatz kits: R1, R2, R3, R4, R6, R7, R8, R11, R12; but R1, R3 and R4 were abandoned shortly thereafter and generally R2, R6, R7 and R8 kits were used."
Fw 190F-3
"The next plane would have been the Fw 190F-3/R3 with two 30 mm MK 103 canons mounted under the wings. It was not produced because of negative test results from the similarly armed Fw 190A-5/U11 (W.Nr. 151303), which was too heavy. In addition it was realized that the MK 103 cannon munitions could not penetrate Russian T-34 tank armor. Only three Fw 190F-3/R3 with two MK 103 cannons were built. "
Fw 190F-8
"Fw 190F-8/R3 - attack plane with two MK 103 30 mm cannons, similar to the A-5/U11 variant. Only two planes built"
Looks like only 6 Fw 190's were built with MK103, unless there were a bunch of A-8/R3 and A-7/R3 built.
But there were only 80 A-7's built total, and it says they phased out the /R3 kit quickly on the A-8.
[This message has been edited by funked (edited 10-20-1999).]