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Interdynamic MP-9 SMG: Origin of the TEC-9

Interdynamic MP-9 SMG: Origin of the TEC-9

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Published on August 13, 2025
Duration: 11:50

This video details the origin of the TEC-9, tracing its lineage back to the Interdynamic AB's MP-9 submachine gun designed by Göran Lars Magnus Kjellgren in Sweden. When military interest waned, Kjellgren brought the design to the US, founding Interdynamic USA. The video covers the evolution from the transferable MP-9 and open-bolt KG-9 to the ATF-mandated closed-bolt KG-99, and the subsequent formation of Intratec by Carlos Garcia after Kjellgren departed to start Grendel. It highlights the historical context of early semi-automatic pistol designs.

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