Enhanced bolt carrier assembly

Abstract

A bolt carrier assembly having a bolt carrier with at least one gas exit hole located at the bottom of the bolt carrier so as to allow the passage of gas generated from a discharged round of ammunition downward into the magazine and magazine well of a firearm, away from the user.

1 . A bolt carrier configured to be received in an upper receiver defining a passage and having an ejection port on a first lateral side, the bolt carrier comprising:
 a body defining a bore;   a bolt in the bore;   the bolt carrier defining a first gas passage communicating with the bore;   the gas passage extending in a downward direction; and   the gas passage having an exit aperture at a lower portion of the bolt carrier.   
     
     
         2 . A bolt carrier comprising:
 a body defining a bore;   a bolt in the bore;   the bolt carrier defining a first gas passage communicating with the bore;   the gas passage extending in a downward direction; and   the gas passage having an exit aperture at a lower portion of the bolt carrier.   
     
     
         3 . The bolt carrier of  claim 2  where the exit aperture is proximate to a magazine well. 
     
     
         4 . The bolt carrier of  claim 2  where the passage is forward of a gas ring on the bolt. 
     
     
         5 . The bolt carrier of  claim 2  including plurality of gas passages communicating with the bore. 
     
     
         6 . The bolt carrier of  claim 2  where the exit aperture is away from an ejection port when the bolt carrier is inserted into a rifle. 
     
     
         7 . The bolt carrier of  claim 2  where the second passage is rearward of the first gas passage. 
     
     
         8 . The bolt carrier of  claim 2  where the second gas passage rearward of the gas ring. 
     
     
         9 . The bolt carrier of  claim 2  wherein the bolt has a gas ring sealably interfacing the bore,
 and wherein the bolt is operable to move from a forward position to a rearward position, 
 and wherein the gas passage is located forward of a location of the gas ring when the bolt is in the rearward position and rearward of the gas ring when the bolt is in the forward position. 
 
     
     
         10 . A firearm comprising:
 a frame having an ejection port and defining a bolt passage;   a bolt carrier received in the bolt passage;   a body defining a bore;   a bolt in the bore;   a bolt carrier defining a first gas passage communicating with the bore; and   the gas passage extending in a downward direction and having exit apertures at a lower portion of the bolt carrier.   
     
     
         11 . The bolt carrier of  claim 10  where passages exit aperture terminate near mag well. 
     
     
         12 . The bolt carrier of  claim 10  where the passage is forward of a gas ring on the bolt. 
     
     
         13 . The bolt carrier of  claim 10  where the plurality of gas passages. 
     
     
         14 . The bolt carrier of  claim 10  where the exit aperture away from ejection port. 
     
     
         15 . The bolt carrier of  claim 10  where the second passage is rearward of the first gas passage. 
     
     
         16 . The bolt carrier of  claim 10  where the second gas passage is rearward of the gas ring. 
     
     
         17 . A breech bolt assembly comprising of:
 a bolt carrier being an elongated body having a top side and 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;   the 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 the exterior to the central bore;   a bolt; and   a carrier gas key.   
     
     
         18 . The breech bolt assembly of  claim 17  where the bottom side of the bolt section has a first bottom channel traversing from the exterior to the bolt body channel, and a second bottom channel traversing from the exterior to the boat tail channel. 
     
     
         19 . The breech bolt assembly of  claim 17  where the bottom side of the bolt section has a bottom channel traversing from the exterior of the left groove to the bolt body channel, a bottom channel traversing from the exterior of the left groove to the bolt tail channel, a bottom channel traversing from the exterior of the right groove to the bolt body channel, and a bottom channel traversing from the exterior of the right groove to the bolt tail channel. 
     
     
         20 . (canceled)