Blokesplaining Direct Gas Impingements: Ljungman vs AR15

Bloke wipes off his chalkboard to blokesplain the differences between direct gas impingement à la Ljungman AG42, MAS49 etc. and à la AR15.

Note: this video also Blokesplaines AK barrel sploing!

Early direct gas patent: https://www.google.com/patents/US799884

Stoner’s patent: http://www.google.com/patents/US2951424

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