Locking Block Rail Insert

Abstract

The present invention provides a pistol with a frame having a rear grip, a trigger facility forward of the grip and an upper surface. An elongated slide connects to the frame and is operable to reciprocate along the upper surface. The frame defines a trigger recess open above the trigger facility at the upper surface. An insert has a major portion removably received in the trigger recess and has a rail extending from the major portion above the upper surface. The frame rail is adapted to connect with the slide to constrain reciprocation of the slide.

1 . A pistol, comprising:
 a frame having a rear grip, a trigger facility forward of the grip and an upper surface;   an elongated slide connected to the frame and operable to reciprocate along the upper surface;   the frame defining a trigger recess open above the trigger facility at the upper surface;   an insert having a major portion removably received in the trigger recess and having a rail extending from the major portion above the upper surface, the frame rail adapted to connect with the slide to constrain reciprocation of the slide.   
     
     
         2 . The pistol of  claim 1 , wherein the trigger recess of the frame has opposed parallel sidewalls, and the insert is closely received between the sidewalls. 
     
     
         3 . The pistol of  claim 1 , wherein the insert has opposed parallel vertical elongated portion connected to each other at their upper ends by a span, and each having a frame rail at its upper end. 
     
     
         4 . The pistol of  claim 3 , further including at least three pin contact surfaces define in each elongated portion to engage three pins, and corresponding holes in the frame registered with the apertures to receive the pins. 
     
     
         5 . The pistol of  claim 3 , wherein the elongated portions each have front edges and rear edges, and wherein the trigger recess has respective front contact surfaces and rear contact surfaces closely abutting the insert front edges. 
     
     
         6 . The pistol of  claim 1 , further including a slide stop block on each side of the pistol frame to stop the slide as the slide moves rearward along the rails; and wherein the elongated portions each have a stop support surface to engage and support the slide stop block. 
     
     
         7 . The pistol of  claim 3 , wherein the span has a stop surface to constrain reciprocation of a barrel moving rearward during recoil. 
     
     
         8 . A locking block rail insert adapted to be mounted in a trigger recess of a pistol frame, comprising:
 a right side with a rail that is adapted to accept a slide;   a left side with a rail that is adapted to accept the slide;   a cross member mounted between the right side and the left side, wherein the right side and left side are connected together by the cross member; and   contact edges along edges of the right side and the left side adapted to engage contact surfaces within the trigger recess of the pistol frame.   
     
     
         9 . The locking block rail insert of  claim 8 , wherein the cross member includes a stop surface adapted to constrain rearward motion of a barrel during recoil. 
     
     
         10 . The locking block rail insert of  claim 8 , wherein the right side and the left side each include at least three pin contact surfaces adapted to receive and engage a pin to secure the locking block rail insert in the pistol frame. 
     
     
         11 . The rear rail insert of  claim 8 , wherein the right side and the left side each include a front leg and a rear leg, the front leg and the rear leg each having a contact edge adapted to engage contact surfaces within the trigger recess of the pistol frame. 
     
     
         12 . The rear rail insert of  claim 11 , wherein the contact edge of each rear leg includes a radius adapted to match a curved contact surface of the pistol frame. 
     
     
         13 . The rear rail insert of  claim 11 , wherein each of the front legs and rear legs include a pin hole adapted to engage a pin in the pistol frame and wherein each of the rear legs include a semi-circle cut out adapted to engage a pin in the pistol frame. 
     
     
         14 . The locking block rail insert of  claim 8 , wherein the right side and the left side each have a stop support surface adapted to engage and support a slide stop block on each side of the pistol frame to stop the slide as the slide moves rearward along the rails. 
     
     
         15 . The locking block rail insert of  claim 8 , wherein the right side and the left side each have a slide stop block adapted to stop the slide as the slide moves rearward along the rails. 
     
     
         16 . A kit of parts for assembling a pistol comprising:
 a pistol frame having a trigger recess, the trigger recess having contact surfaces inside of the trigger recess;   a slide; and   a locking block rail insert to be mounted in the trigger recess of the pistol frame;   the locking block rail insert comprising:   a right side with a rail that is adapted to accept a slide;   a left side with a rail that is adapted to accept the slide;   a cross member mounted between the right side and the left side, wherein the right side and left side are connected together by the cross member; and   contact edges along edges of the right side and the left side adapted to engage contact surfaces within the trigger recess of the pistol frame.   
     
     
         17 . The rear rail insert of  claim 16 , wherein the right side and the left side each include a front leg and a rear leg, the front leg and the rear leg each having a contact edge adapted to engage contact surfaces within the trigger recess of the pistol frame. 
     
     
         18 . The locking block rail insert of  claim 16 , wherein the right side and the left side each have a stop support surface adapted to engage and support a slide stop block on each side of the pistol frame to stop the slide as the slide moves rearward along the rails. 
     
     
         19 . The locking block rail insert of  claim 16 , wherein the right side and the left side each have a slide stop block adapted to stop the slide as the slide moves rearward along the rails. 
     
     
         20 . The locking block rail insert of  claim 16 , wherein the right side and the left side each include at least three pin contact surfaces to each receive and engage a pin to secure the locking block rail insert in the pistol frame.