Advanced jig for manufacturing of firearm lower receiver

Abstract

An advanced jig for manufacturing a firearm lower receiver can include an adapter, a guide plate, a front support, a buffer support, a buffer mounting screw and at least one carriage with at least one locating pin. A guide plate can be in a location above the fire control cavity of a lower receiver and can be mounted to the carriage(s) in conjunction with a rotary power tool adapter. The jig can be a universal fitment. The jig can include a bearing to support a rotary tool and can be constructed and arranged to provide for use of at least one guiding feature to facilitate in the guidance of the rotary tool without placing the rotary tool in direct contact with any of a plurality of guidance features for firearm lower receiver manufacturing. A removable locating pin can be situated in a location along the front takedown pin hole of a firearm receiver that is for firearm lower receiver manufacturing.

1 . (canceled) 
     
     
         2 . A jig for manufacturing a lower receiver from a blank having a buffer tube and a takedown pin hole, comprising:
 a top plate configured to be supported by a front support and a buffer support;   a rotary tool adaptor configured to be supported by the top plate;   a rotary power tool coupled to a rotary tool configured to be supported by the top plate and the rotary tool adaptor;   a first carriage plate and a second carriage plate configured to be positioned on respective first and second sides of the lower receiver; and   a locating pin configured to extend through the front support to secure the front support to the lower receiver.   
     
     
         3 . The jig of  claim 2 , wherein the first carriage plate has a thickness of at least 1.0 inches. 
     
     
         4 . The jig of  claim 2 , wherein the second carriage plate has a thickness of at least 1.0 inches. 
     
     
         5 . The jig of  claim 4 , wherein the first carriage plate is coupled to the top plate by a first set of fasteners extending through the top plate, wherein the second carriage plate is coupled to the top plate by a second set of fasteners extending through the top plate. 
     
     
         6 . The jig of  claim 5 , wherein a first row of the first set of fasteners is coupled along a first side of the first carriage plate and a second row of the first set of fasteners is coupled along a second side of the first carriage plate. 
     
     
         7 . The jig of  claim 6 , wherein the thickness is in a direction between the first row and the second row of the first set of fasteners. 
     
     
         8 . The jig of  claim 4 , wherein the thickness is configured to allow the rotary tool to resist skewing. 
     
     
         9 . The jig of  claim 2 , wherein the locating pin is a bolt. 
     
     
         10 . The jig of  claim 2 , wherein a proximal end of each of the first and second carriage plates is coupled with the top plate and a distal end of each of the first and second carriage plates extends therefrom. 
     
     
         11 . The jig of  claim 10 , wherein the distal ends of the first and second carriage plates extend below a lowermost point of the lower receiver. 
     
     
         12 . The jig of  claim 2 , wherein the first carriage plate includes a drill guide hole aligned with a location for a hammer pin, the drill guide hole having a depth of at least 1 inch. 
     
     
         13 . The jig of  claim 2 , wherein the first carriage plate includes a plurality of drill guide holes aligned with a location for a hammer pin, a trigger pivot, and a selector. 
     
     
         14 . The jig of  claim 2 , wherein the buffer support includes can have one or more buffer attachment holes, a buffer locator hole, and a boss. 
     
     
         15 . A jig for manufacturing a lower receiver from a blank having a buffer tube and a takedown hole, comprising:
 a top plate configured to be supported by a front support and a buffer support, the buffer support comprising:
 one or more buffer attachment holes configured to receive fasteners; 
 a buffer locator hole configured to engage a buffer locator; and 
 a boss configured to engage with a buffer tube alignment hole on a lower receiver; 
 wherein the fasteners extending through the one or more buffer attachment holes are configured to couple to the top plate; 
   a rotary power tool coupled to a rotary tool configured to be supported by the top plate; and   a first carriage plate and a second carriage plate configured to be positioned on respective first and second sides of the lower receiver.   
     
     
         16 . The jig of  claim 15 , wherein the first carriage plate has a thickness of at least 1.0 inches. 
     
     
         17 . The jig of  claim 15 , wherein the second carriage plate has a thickness of at least 1.0 inches. 
     
     
         18 . The jig of  claim 15 , wherein a proximal end of each of the first and second carriage plates is coupled with the top plate and a distal end of each of the first and second carriage plates extends therefrom. 
     
     
         19 . The jig of  claim 15 , wherein a locating pin can is configured to couple the front support to the lower receiver. 
     
     
         20 . The jig of  claim 15 , wherein the first carriage plate includes a plurality of drill guide holes aligned with a location for a hammer pin, a trigger pivot, and a selector. 
     
     
         21 . The jig of  claim 15 , wherein the second carriage plate includes a plurality of drill guide holes aligned with a location for a hammer pin, a trigger pivot, and a selector.