I had always assumed that Andreas Schwarzlose himself was responsilble for the design of the blow forward. Legend has it the the design was to prevent the very thing you describe about old Colts. His relatively slow-firing machine gun had a fair amount of success in the early days for the Austro-Hungarian Armies.
There is a pretty good picture of the the internals of the 1908 in Smith's book Pistols and Revolvers. Overall, it actually looks fairly simple, mechanically, if you overlook the unorthodox way it operates. Smith also writes that the recoil tends to be excessive.
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