Open bolt assault rifle patent

openboltassaultrifle1

Here is an interesting patent (US4019423) for an open bolt assault rifle which looks like a cross between a STEN and an M16. A large compression spring is depicted in front of the barrel assembly which in theory will slightly delay the breech opening when struck by the bolt as a round is chambered. A very simple concept on paper, though I can see a hang-fire not being too pleasant.

openboltassaultriflefiring

openboltassaultrifletrigger




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