Versatile buffer/spring assembly for a firearm

Abstract

A collapsible stock for a firearm and a firearm therewith. The firearm uses an action mechanism to discharge a cartridge so that a bullet travels through a barrel have a length of between seven inches and twenty four inches. The collapsible stock assists the action mechanism in ejecting a spent cartridge and injecting a fresh cartridge into the action. The collapsible stock is a slidable butt member which engages a stock tube. Within the stock tube is a uniform spring capable of reliably operating for varying barrel lengths together with a buffer mechanism working with the spring.

1 . A collapsible stock for a firearm having a barrel having a length of between seven inches and twenty four inches, said collapsible stock comprising:
 a) a slidable butt member;   b) a stock tube having an open end and a closed end, said receiver extension configured to receive said slidable butt member therearound;   c) a spring positioned within said stock tube; and,   d) a buffer mechanism positioned to engage said spring within said stock tube proximate to the open end of said stock tube.   
     
     
         2 . The collapsible stock according to  claim 1 , wherein a single uniform spring is applied irrespective of the barrel length. 
     
     
         3 . The collapsible stock according to  claim 2 , wherein said spring has a wire diameter of substantially 0.072 inches. 
     
     
         4 . The collapsible stock according to  claim 3 , wherein said spring has 44 total coils and exerts a spring rate of substantially 1.35 pounds per inch. 
     
     
         5 . The collapsible stock according to  claim 1 , where said buffer mechanism has a mass between 4.2 and 5.1 ounces. 
     
     
         6 . The collapsible stock according to  claim 5 , wherein said buffer includes:
 a) a sleeve member having an open end and a closed end, except for a collar thereon, said sleeve member having a diameter less than a diameter of said spring;   b) at least four weights contained within said sleeve member, at least one of said weights having a mass greater than the mass another weight; and,   c) a bumper secured to and sealing the open end of said sleeve member.   
     
     
         7 . The collapsible stock according to  claim 6 , wherein an overall length of said buffer is between 3.8 and 4.1 inches. 
     
     
         8 . The collapsible stock according to  claim 1 , wherein said stock tube has an internal length of between 7.5 and 8 inches. 
     
     
         9 . The collapsible stock according to  claim 8 , wherein said internal length of said stock tube is adjustable by an operator. 
     
     
         10 . The collapsible stock according to  claim 8 , wherein,
 a) said stock tube includes a butt stock receiver having at least two engaging points; and,   b) said slidable butt is configured to slide over an outside of said stock tube and selectively engage one of said at least six engaging points.   
     
     
         11 . A mechanism receiving a slidable butt member for a firearm having a barrel having a length of between seven inches and twenty four inches, said collapsible stock comprising:
 a) a stock tube having an open end and a closed end, said receiver extension configured to receive the slidable butt member;   b) a uniform spring being used irrespective of the barrel length; and,   c) a buffer mechanism positioned to contact said spring within said stock tube proximate to the open end of said stock tube.   
     
     
         12 . The mechanism according to  claim 11 , wherein said spring has a wire diameter of substantially 0.072 inches and has 44 total coils and exerts a spring rate of substantially 1.35 pounds per inch. 
     
     
         13 . The mechanism according to  claim 12 , wherein said buffer includes:
 a) a sleeve member having an open end and a closed end, said sleeve member, except for a collar thereon, has a diameter less than a diameter of said spring;   b) at least four weights contained within said sleeve member, at least one of said weights having a mass greater than the mass another weight; and,   c) a bumper secured to and sealing the open end of said sleeve member; and,   d) wherein a mass of said buffer is a mass between 4.2 and 5.1 ounces.   
     
     
         14 . The mechanism according to  claim 13 , wherein an overall length of said buffer is between 3.8 and 4.1 inches. 
     
     
         15 . The mechanism according to  claim 11 , wherein said stock tube has an internal length of 7.771 inches. 
     
     
         16 . A firearm comprising:
 a) an action mechanism configured to engage a cartridge and selectively fire said cartridge;   b) a barrel having a length of between seven inches and twenty four inches, said barrel receiving a bullet from said cartridge; and,   c) collapsible stock assembly positioned to assist said action mechanism in ejecting a spent cartridge and injecting a fresh cartridge into said action in preparation for firing, said collapsible stock assembly having,
 1) a slidable butt member, 
 2) a stock tube having an open end and a closed end, said receiver extension configured to receive said slidable butt member therearound; 
 3) a uniform spring positioned within said stock tube, said uniform spring being used irrespective of the barrel length, and, 
 4) a buffer mechanism positioned to engage said spring within said stock tube proximate to the open end of said stock tube. 
   
     
     
         17 . The firearm according to  claim 16 , wherein said spring has a wire diameter of substantially 0.072 inches, 44 total coils and exerts a spring rate of substantially 1.35 pounds per inch. 
     
     
         18 . The firearm according to  claim 16 , wherein said buffer mechanism has a mass between 4.2 and 5.1 ounces and an overall length of said buffer is between 3.8 and 4.1 inches, said buffer mechanism having:
 a) a sleeve member having an open end and a closed end, said sleeve member, except for a collar thereon, having a diameter less than a diameter of said spring;   b) at least four weights contained within said sleeve member, at least one of said weights having a mass greater than the mass another weight; and,   c) a bumper secured to and sealing the open end of said sleeve member.   
     
     
         19 . The firearm according to  claim 16 , wherein said stock tube has an internal length of between 7.5 and 8 inches. 
     
     
         20 . The firearm according to  claim 16 , wherein,
 a) said stock tube includes a butt plate receiver having at least six engaging points; and,   b) said slidable butt is configured to slide over an outside of said stock tube and selectively engage one of said at least six engaging points.