Adjustable gas block

Abstract

Disclosed is an adjustable gas block for a gas-operated firearm, such as an AK-type rifle or pistol. The adjustable gas block enables the user to adjust the volume of gas being directed to the host firearm's operating system. In particular, the adjustable gas block includes a rotatable gas valve used to adjust the gas flow between the barrel and operating system of the gas-operated firearm.

1 . An adjustable gas block for a gas-operated firearm comprising:
 a gas block configured to be affixed to a barrel of the gas-operated firearm, the gas block comprising: a gas block channel, a barrel receiving channel configured to receive a portion of the barrel therein, a slot separating a bearing surface from a front end of the gas block channel, and a gas conduit configured to provide a fluid communication path between a gas port of the barrel and the gas block channel; and   a rotatable gas valve configured to adjust the flow of gas entering the gas block channel through the gas conduit, the rotatable gas valve comprising: a valve stem and a knob, the valve stem extends into a forward portion of the gas block channel and includes at least two laterally disposed apertures that can be individually registered with the gas conduit of the gas block, the knob includes an annular shoulder;   wherein the slot is configured to retain the rotatable gas valve in position and allow for its rotation.   
     
     
         2 . The adjustable gas block of  claim 1 , wherein a portion of the annular shoulder is positioned within the slot of the gas block and captured between the front end of the gas block channel and the bearing surface of the gas block. 
     
     
         3 . The adjustable gas block of  claim 2 , wherein the annular shoulder of the rotatable gas valve has a cutout in the periphery configured to allow the bearing surface of the gas block to pass therethrough.