Could you post the following there :
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First of all there were two main group of Friedrich the F-1/F-2 equiped with the DB601N and the later F-3/F-4 equiped with the DB601E.
The first F-1s rolled out of MttGmbH Regensburg in October 1940 and production ended there in february 1941
The F-2 got produced in october 1940 by AGO, and production was ended in August 1941 at the Arado factory.
F-4 production began at WNF a factory in May 1941 and ended in Erla factory in May 1942.
The F-1/F-3 were originaly equiped with the MG/FF-M motor canon, and the F-2/F-4 with the MG151 in either 15mm or 20mm caliber. The armament manual is quite clear about it, as mounting of a 15 or 20mm MG151 is detailled for BOTH DB601N and DB601E.
Moreover number of rounds is not 150 as stated in most books but 200 for 15mm AND 20mm, reference is again the 109F armament manual.
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