"this is where Hitler thought Germany was going technologically but there was no room for a semi auto?"
Pie in the sky plans on paper are one thing, and they often have little to do with economic and manufacturing reality.
Just because the Germans laid out plans for 90,000 ton battleships with 20 inch main guns doesn't mean that they had the economic or industrial capacity to build it OR rearm their military with semi-automatic/selective fire battle rifles.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.