Firearm Gas System

Abstract

A gas system for a firearm is presented. The gas system has an elongate static tube and an elongate dynamic tube in a telescoping relationship. The elongate static tube defines a first internal passageway and is attachable to a portion of the gas block of the firearm. The elongate dynamic tube is telescopingly engaged with the elongate static tube. The elongate dynamic tube defines a second internal passageway in communication with the first internal passageway.

What is claimed is: 
     
         1 . A gas system for a firearm having a bolt, a bolt carrier, a gas key attached to the bolt carrier, a receiver, a barrel defining a gas port, a gas block attached to the barrel having an aperture in communication with the gas port, the gas system comprising:
 an elongate static tube defining a first internal passageway, the elongate static tube having a proximal end and a distal end, the distal end being attachable to a portion of the gas block where, when attached to the gas block, the first internal passageway is in communication with the aperture of the gas block; and   an elongate dynamic tube having a proximal end and a distal end, the elongate dynamic tube being telescopingly engaged with the elongate static tube wherein the proximal end of the elongate dynamic tube is configured to be fastened to the gas key of the firearm, and wherein the elongate dynamic tube defines a second internal passageway that is in communication with the first internal passageway;   
       wherein firing the firearm causes high pressure gases to enter into the first and second internal passageways via the aperture in the barrel, thereby extending the telescoping relationship between the static tube and the dynamic tube and forcing the bolt carrier proximally. 
     
     
         2 . The gas system of  claim 1 , wherein the first and second internal passageways are substantially sealed, with the exception of the distal end of the elongate static tube. 
     
     
         3 . The gas system of  claim 1 , further comprising at least one exhaust port defined adjacent the proximal end of the dynamic tube, wherein, the exhaust port is normally closed. 
     
     
         4 . The gas system of  claim 3 , wherein when the bolt is pushed forward, the at least one exhaust port is opened to enable release of gas. 
     
     
         5 . The gas system of  claim 4 , wherein when the gas is released and the bolt is moved distally, the at least one exhaust port returns to the closed position. 
     
     
         6 . A firearm system, comprising:
 a firearm having a bolt, a bolt carrier, a gas key attached to the bolt carrier, a receiver, a barrel defining a gas port, a gas block attached to the barrel having an aperture in communication with the gas port;   an elongate static tube defining a first internal passageway, the elongate static tube having a proximal end and a distal end, the distal end being attachable to a portion of the gas block where, when attached to the gas block, the first internal passageway is in communication with the aperture of the gas block; and   an elongate dynamic tube having a proximal end and a distal end, the elongate dynamic tube being telescopingly engaged with the elongate static tube wherein the proximal end of the elongate dynamic tube is configured to be fastened to the gas key of the firearm, and wherein the elongate dynamic tube defines a second internal passageway that is in communication with the first internal passageway;   
       wherein firing the firearm causes high pressure gases enter into the first and second internal passageways via the aperture in the barrel, thereby extending the telescoping relationship between the static tube and the dynamic tube and forcing the bolt carrier proximally. 
     
     
         7 . The gas system of  claim 6 , wherein the first and second internal passageways are substantially sealed, with the exception of the distal end of the elongate static tube. 
     
     
         8 . The gas system of  claim 6 , further comprising at least one exhaust port defined adjacent the proximal end of the dynamic tube, wherein, the exhaust port is normally closed. 
     
     
         9 . The gas system of  claim 8 , wherein when the bolt is pushed forward, the at least one exhaust port is opened to enable release of gas. 
     
     
         10 . The gas system of  claim 9 , wherein when the gas is released and the bolt is moved distally, the at least one exhaust port returns to the closed position.