US12474132 - Enhanced bolt carrier assembly

The patent describes an enhanced bolt carrier assembly designed to direct gas generated from a discharged round downward into the magazine and magazine well, minimizing exposure to the user. This assembly features a bolt carrier with multiple gas channels and grooves that facilitate the efficient movement of gases away from the shooter’s area.

Claim 1

1 . A breech bolt assembly comprising of: a bolt carrier being an elongated body having a top side and a bottom side, a left side and right side, and defining a bolt section, hammer section, and end section; said body having an exterior and a central bore along a central bore axis; said bolt section having a bolt head end, a bolt body section, and a bolt tail end section; the bolt body section defining a bolt body channel and a gas ring channel; the bolt tail end defining a boat tail channel and a carrier firing pin channel; the bolt body channel, gas ring channel, bolt tail channel, and carrier firing pin channel aligned along the central bore axis; a bottom side of the bolt section defining a left groove and a right groove with a boss in between, and at least one bottom gas channel traversing from an exterior to the central bore; where the bottom side of the bolt section has a bottom channel traversing from an exterior of the left groove to the bolt body channel, a bottom channel traversing from the an exterior of the left groove to the bolt tail channel, a bottom channel traversing from an exterior of the right groove to the bolt body channel, and a bottom channel traversing from an exterior of the right groove to the bolt tail channel; a bolt; and a carrier gas key. a bolt carrier being an elongated body having a top side and a bottom side, a left side and right side, and defining a bolt section, hammer section, and end section; said body having an exterior and a central bore along a central bore axis; said bolt section having a bolt head end, a bolt body section, and a bolt tail end section; the bolt body section defining a bolt body channel and a gas ring channel; the bolt tail end defining a boat tail channel and a carrier firing pin channel; the bolt body channel, gas ring channel, bolt tail channel, and carrier firing pin channel aligned along the central bore axis; a bottom side of the bolt section defining a left groove and a right groove with a boss in between, and at least one bottom gas channel traversing from an exterior to the central bore; where the bottom side of the bolt section has a bottom channel traversing from an exterior of the left groove to the bolt body channel, a bottom channel traversing from the an exterior of the left groove to the bolt tail channel, a bottom channel traversing from an exterior of the right groove to the bolt body channel, and a bottom channel traversing from an exterior of the right groove to the bolt tail channel; a bolt; and a carrier gas key.

Google Patents

https://patents.google.com/patent/US12474132

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12474132