Some of the 410B-2 had two MK103 in the weaponsroom. First delivery was june 44.From 320 build B-2s around 100 were armed with MK103 , the rest with 5cm BK (/U4) or the 2 additional MG151/20 (/U2)
But you have to consider, the development of the MK103 took a lot of time. It became realy serviceable short before the Me410 programm was canceled, by order of 1. July 44.
The last 40 Me410s were delivered to the LW in September 44.
the 410 could carry small bombs (SC50/70, AB23) at 4 bombracks below the innersection of the wing.
but the frontunits deleted them very fast to get more speed and range.....................
another annyoing point was, already with the 210 , that the bombload of 8xSC50 intern couldnt be used in a diveattack . the bombs didnt came clear from the bombbay
