Auto-sear for a firearm

Abstract

Various embodiments are directed to auto-sears for a firearm, firearms, and methods of operating the same. In various embodiments, an auto-sear for a firearm may comprise a body configured to being pivotally mounted within a lower receiver of the firearm, the body having a front surface defined between a leading top body surface edge of a top surface and a leading bottom surface edge of a bottom surface; wherein an upper portion of the front surface is disposed on a first plane and a lower portion of the front surface is disposed on a second plane; and wherein at least a portion of the first plane is non-planar with the second plane. In various embodiments, the top surface of the body comprises a curved shape defined along a portion of the leading top surface edge.

1 . An auto-sear configured for a firearm, the auto-sear comprising:
 a body configured for being pivotally mounted within a lower receiver of the firearm, the body having a front surface defined between a leading top body surface edge of a top surface and a leading bottom surface edge of a bottom surface;   wherein an upper portion of the front surface is disposed on a first plane and a lower portion of the front surface is disposed on a second plane; and   wherein at least a portion of the first plane is non-planar with the second plane.   
     
     
         2 . The auto-sear of  claim 1 , wherein the leading top body surface edge of the front surface is disposed on the first plane and leading bottom body surface edge of the front surface is disposed on the second plane. 
     
     
         3 . The auto-sear of  claim 1 , wherein the upper portion of the front surface defines a first planar portion of the front surface and the lower portion of the front surface defines a second planar portion of the front surface, wherein the first planar portion is angularly offset from the second planar portion. 
     
     
         4 . The auto-sear of  claim 3 , wherein the first planar portion is angularly offset from the second planar portion by an angle of separation of between 6.5 degrees and 8.5 degrees. 
     
     
         5 . The auto-sear of  claim 3 , wherein the body comprises an angled body portion that is defined at least in part by the first planar portion of the front surface. 
     
     
         6 . The auto-sear of  claim 1 , further comprising a leg configured to contact at least one interior portion of the lower receiver, wherein the leg extends opposite the front surface of the body. 
     
     
         7 . The auto-sear of  claim 6 , wherein the leg extends from a proximal leg end defined at a back surface of the body to a distal leg end, and wherein the leading bottom surface edge is closer to the proximal leg end than the leading top surface edge. 
     
     
         8 . The auto-sear of  claim 7 , wherein the leading top surface edge is provided in a forward position with respect to the leading bottom surface edge relative to the proximal leg end. 
     
     
         9 . The auto-sear of  claim 1 , wherein the top surface of the body comprises a curved shape as defined along a portion of the leading top surface edge. 
     
     
         10 . The auto-sear of  claim 9 , wherein the curved shape is defined by a u-shaped profile of the portion of the leading top surface edge. 
     
     
         11 . The auto-sear of  claim 10 , wherein the body defines an upper sear trip engagement portion having two raised contact portions with a central recess provided therebetween, and wherein the upper sear trip engagement portion is defined at least in part by the curved shape of the top surface of the body such that the central recess is defined by the u-shaped profile of the portion of the leading top surface edge. 
     
     
         12 . The auto-sear of  claim 1 , wherein the auto-sear defines a pivot axis about which the auto-sear is configured to rotate; wherein a contact portion of the leg defined along at least a portion of a back surface of the body defines a vertical axis; and wherein a first axis intersecting a forwardmost part of the leading top surface edge and being parallel to the vertical axis is farther from the pivot axis than a second axis intersecting the forwardmost part of the leading bottom surface edge. 
     
     
         13 . A firearm comprising:
 an upper receiver assembly comprising a bolt carrier; and   a lower receiver assembly comprising a trigger, a disconnector, a hammer, and an auto-sear, the auto-sear comprising:   a body configured for being pivotally mounted within a lower receiver of the firearm, the body having a front surface defined between a leading top body surface edge of a top surface and a leading bottom surface edge of a bottom surface;   wherein an upper portion of the front surface is disposed on a first plane and a lower portion of the front surface is disposed on a second plane; and   wherein at least a portion of the first plane is non-planar with the second plane.   
     
     
         14 . The firearm of  claim 13 , wherein the leading top body surface edge of the front surface is disposed on the first plane and leading bottom body surface edge of the front surface is disposed on the second plane. 
     
     
         15 . The firearm of  claim 13 , wherein the upper portion of the front surface defines a first planar portion of the front surface and the lower portion of the front surface defines a second planar portion of the front surface, wherein the first planar portion is angularly offset from the second planar portion. 
     
     
         16 . The firearm of  claim 15 , wherein the first planar portion is angularly offset from the second planar portion by an angle of separation of between 6.5 degrees and 8.5 degrees. 
     
     
         17 . The firearm of  claim 13 , wherein the top surface of the body comprises a curved shape as defined along a portion of the leading top surface edge. 
     
     
         18 . The firearm of  claim 17 , wherein the curved shape is defined by a u-shaped profile of the portion of the leading top surface edge. 
     
     
         19 . The firearm of  claim 18 , wherein the body defines an upper sear trip engagement portion having two raised contact portions with a central recess provided therebetween, and wherein the upper sear trip engagement portion is defined at least in part by the curved shape of the top surface of the body such that the central recess is defined by the u-shaped profile of the portion of the leading top surface edge. 
     
     
         20 . The firearm of  claim 13 , wherein the firearm is an AR10 or SR25 platform firearm.