Due to numerous requests for a semi-auto version of my BSP-SMG Machine Gun design, I assembled these drawings to illustrate my idea as to how such a gun could be constructed. This is a semi-auto version of my simple full-auto design. The following drawings are intended as a brief outline only due to time limitations.
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Firearm Manuals Expedient Homemade Firearms - 9mm Semi Auto 2016-07-28
10 page PDF modifiying the 9mm Sub Machine Gun plans