This guide details the operation and safety features of the Interdynamic MP-9 SMG, the predecessor to the TEC-9. It covers understanding the open-bolt system, fire selector, collapsible stock, and the unique receiver notch safety. The explanation also touches upon the internal trigger mechanics for semi-automatic fire, highlighting the disconnector's function. Instruction is provided by Ian McCollum, demonstrating expert-level knowledge of historical firearms.
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