Firearm stock with locking mechanism

Abstract

A stock for a firearm is disclosed. The stock has a locking mechanism. The locking mechanism prevents the movement of the stock relative to a receiver extension. A locking member protrudes into a corresponding recess in the receiver extension, creating a detent arrangement. The locking member, a locating member, a crossbar, and a pin interact with one another and the stock to prevent disengagement of the detent arrangement.

What is claimed is: 
     
         1 . A stock for a firearm, comprising:
 a housing defined by a longitudinal axis aligned with a firing direction of the firearm and having a proximal end and a distal end, the housing being further defined by a firearm engagement surface on an interior of the housing and configured to slidingly abut a receiving component of the firearm;   a shoulder plate disposed on the proximal end of the housing and configured to allow a user to brace the stock;   a distal end opening on the distal end of the housing, the distal end opening shaped to receive an end of the receiving component of the firearm;   a pin holding bore extending through the stock and defining a diameter near one end of a locking mechanism bore in the stock, an opposite end of the locking bore in communication with the interior of the housing; and   a locking mechanism, including:
 a locking member defining a locking member bore extending from an opening at a first end of the locking member to a second end of the locking member, and a crossbar bore normal to the locking member bore, the locking member being received within the locking mechanism bore in the stock; 
 a crossbar disposed in the crossbar bore in the locking member and being in engagement with the stock; 
 a locating member in the locking member bore, one end of the locking member being in receptive engagement with the crossbar, the locating member further defining a cross bore with an opening proximal to an opposite end of the locating member; and 
 a pin disposed in the pin holding bore and the locating member cross bore. 
   
     
     
         2 . The stock of  claim 1 , wherein the pin holding bore and the locating member cross bore form a common bore. 
     
     
         3 . The stock of  claim 1 , wherein the locking member has a generally cylindrical shape defining a circumference. 
     
     
         4 . The stock of  claim 3 , further comprising two longitudinal slots, one each on opposing points of the circumference of the of the locking member. 
     
     
         5 . The stock of  claim 1 , wherein the locking member further includes a locking section on a second end of the locking member. 
     
     
         6 . The stock of  claim 5 , wherein the locking section extends from the locking mechanism bore in to the interior of the housing. 
     
     
         7 . The stock of  claim 1 , wherein the crossbar further includes a center notch sized and shaped to engage the one end of the locating member. 
     
     
         8 . The stock of  claim 5 , wherein the locating member has a length of 25 mm. 
     
     
         9 . The stock of  claim 1 , wherein the locating member has a diameter of 5.5 mm. 
     
     
         10 . The stock of  claim 1 , wherein the first end of the locking member includes a taper which matches a taper in a cross piece between the housing and the shoulder plate. 
     
     
         11 . A stock for a firearm, comprising:
 a housing with a proximal end, a distal end, and a hollow interior therebetween;   a holding bore extending through the stock and defining a diameter near one end of a locking bore, an opposite end of the locking bore being in communication with the hollow interior of the housing; and   a locking mechanism, including:
 a locking shaft with a sleeve defining a bore extending from an opening at a first end to a wall proximal to a second end thereof, the sleeve being located in the locking mechanism bore in the stock, and a rod disposed in the bore of the sleeve, one end of the rod being in receptive engagement with the crossbar, the rod defining a cross bore with a diameter near an opposite end of the locating member; 
 a first cross piece disposed in a crossbar bore in the sleeve, the sleeve being in receptive engagement with the stock; and 
 a second cross piece located in the holding bore and the cross bore of the rod. 
   
     
     
         12 . The stock of  claim 11 , wherein the sleeve has a generally cylindrical shape including a circumference. 
     
     
         13 . The stock of  claim 12 , further comprising two longitudinal slots, one each on opposing points of the circumference of the of the sleeve. 
     
     
         14 . The stock of  claim 11 , wherein the pin has a cylindrical shape, including a consistent diameter from the one end to the opposite end. 
     
     
         15 . The stock of  claim 11 , wherein the pin has a circular cross section which tapers from smaller at the one end to larger at the opposite end. 
     
     
         16 . The stock of  claim 11 , wherein the sleeve and pin are formed as a single piece. 
     
     
         17 . The stock of  claim 16 , wherein the an outer diameter of the second cross piece and an inner diameter of the pin cross bore are substantially equal. 
     
     
         18 . A stock for a firearm, comprising:
 a stock frame including a housing configured to receive a firearm receiver extension, a shoulder plate, a locking mechanism bore defining a locking mechanism bore longitudinal axis, the locking mechanism bore in communication with an interior of the tube housing; and a holding bore perpendicular defining a holding bore longitudinal axis perpendicular to the locking mechanism bore longitudinal axis;   means for preventing movement of the stock relative to the firearm receiver extension.   
     
     
         19 . The stock of  claim 18 , wherein the means for preventing movement of the stock relative to the firearm receiver extension extend from the locking mechanism bore in to the interior of the tube housing. 
     
     
         20 . The stock of  claim 18 , wherein the locking mechanism bore further includes two slots opposite one another, the two slots oriented such that a longitudinal axis of the slots is parallel to a longitudinal axis of the locking mechanism bore.