This review details the rare SIG MKPO, a factory semi-automatic variant of a 1930s submachine gun. It highlights the unique folding magazine, tilting bolt mechanism, and various caliber options. Production was limited, with notable users including the Vatican's Swiss Guard and the Finnish military.
This video provides an expert-level examination of a factory semi-automatic SIG MKPO, originally a submachine gun. The instructor details its unique magazine retention mechanism, a simple safety selector, and the intricacies of its tilting bolt system, which functions more as a rate reducer. A crucial safety feature preventing firing without the receiver end cap properly secured is also highlighted.
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