Gas block

Abstract

A gas block assembly can include a front tube; a rear tube; and a rear gas block attaching the front tube to the rear tube in fluid communication. A firearm assembly can include a receiver defining an ejection port; a barrel attached to the receiver; and a gas block assembly comprising: a front tube; a rear tube; and a rear gas block attaching the front tube to the rear tube in fluid communication, the front tube in fluid communication with the barrel and the rear tube in fluid communication with the receiver.

That which is claimed is: 
     
         1 . A gas block assembly, the gas block assembly comprising:
 a front tube;   a rear tube; and   a rear gas block attaching the front tube to the rear tube in fluid communication.   
     
     
         2 . The gas block assembly of  claim 1 , wherein the rear gas block defines:
 a front tube bore sized to accept an end of the front tube;   a rear tube bore sized to accept an end of the rear tube; and   an inner gas passage extending between the front tube bore and the rear tube bore and placing the front tube bore and the rear tube bore in fluid communication with each other.   
     
     
         3 . The gas block assembly of  claim 2 , wherein the front tube bore and the rear tube bore extend in an axial direction relative to an axis of the rear gas block, and wherein the front tube bore is defined radially outward from the rear tube bore relative to the axis of the rear gas block. 
     
     
         4 . The gas block assembly of  claim 2 , wherein the front tube bore is a blind hole extending from a first side of the rear gas block and the rear tube bore is a blind hole extending from a second side of the rear gas block opposite from the first side of the rear gas block. 
     
     
         5 . The gas block assembly of  claim 1 , wherein the rear gas block comprises a mounting screw and defines a mounting bore sized to accept the mounting screw, the mounting screw configured to engage a barrel of a firearm to hold the rear gas block in place against the barrel. 
     
     
         6 . The gas block assembly of  claim 1 , further comprising a front gas block attached to the front tube and in fluid communication with a passage through the front gas block. 
     
     
         7 . The gas block assembly of  claim 6 , wherein the front gas block defines:
 a front tube bore sized to accept an end of the front tube;   a front barrel bore extending through the front gas block and sized to accept a barrel of a firearm; and   a barrel gas passage in fluid communication with the front tube bore and the front barrel bore.   
     
     
         8 . The gas block assembly of  claim 7 , wherein the front tube bore is a blind hole extending from a side of the front gas block in an axial direction relative to an axis of the front gas block, and the barrel gas passage is a blind hole extending from the front barrel bore in a radial direction relative to the axis of the front gas block. 
     
     
         9 . The gas block assembly of  claim 7 , wherein a gap is defined between the end of the front tube and an end of the front tube bore proximate to the barrel gas passage, and wherein the front tube is free to slide, expand, or contract within the front tube bore. 
     
     
         10 . The gas block assembly of  claim 6 , wherein the front gas block comprises a mounting screw and defines a mounting bore sized to accept the mounting screw, the mounting screw configured to engage a barrel of a firearm to hold the front gas block in place against the barrel. 
     
     
         11 . The gas block assembly of  claim 1 , wherein the front tube and the rear tube are fixed to the rear gas block. 
     
     
         12 . The gas block assembly of  claim 1 , wherein the rear gas block defines a gas adjustment bore in fluid communication with the front tube and the rear tube, and wherein the rear gas block comprises a gas adjustment screw positioned in the gas adjustment bore, the gas adjustment screw positionable within the gas adjustment bore to adjust a gas flow through the rear gas block from the front tube to the rear tube. 
     
     
         13 . A firearm assembly comprising:
 a receiver defining an ejection port;   a barrel attached to the receiver; and   a gas block assembly comprising:
 a front tube; 
 a rear tube; and 
 a rear gas block attaching the front tube to the rear tube in fluid communication, the front tube in fluid communication with the barrel and the rear tube in fluid communication with the receiver. 
   
     
     
         14 . The firearm assembly of  claim 13 , wherein the gas block assembly further comprises a front gas block attaching the front tube in fluid communication with the barrel. 
     
     
         15 . The firearm assembly of  claim 14 , wherein the front tube is fixed to the rear gas block at a first end of the front tube and the front tube defines a second end positioned within the front gas block that is free to slide, expand, or contract within the front gas block. 
     
     
         16 . The firearm assembly of  claim 13 , wherein the rear tube is fixed to the rear gas block at a first end and extends freely into the receiver. 
     
     
         17 . The firearm assembly of  claim 13 , wherein the rear gas block is mounted on and fixed to the barrel. 
     
     
         18 . The firearm assembly of  claim 13 , further comprising a suppressor, the front tube extending from the rear gas block into an interior of the suppressor. 
     
     
         19 . The firearm assembly of  claim 18 , wherein the rear gas block abuts an end of the suppressor. 
     
     
         20 . The firearm assembly of  claim 13 , wherein the rear gas block defines a gas adjustment bore in fluid communication with the front tube and the rear tube, and wherein the rear gas block comprises a gas adjustment screw positioned in the gas adjustment bore, the gas adjustment screw positionable within the gas adjustment bore to adjust a gas flow through the rear gas block from the barrel, through front tube and the rear tube, to the receiver.