Clamp on gas block apparatus

Abstract

Gas block apparatus for receiving combustion gases from a firearm barrel clamps onto the barrel. A block is disposed on the top of the barrel and a clamp portion is disposed on the bottom of the barrel and clamps onto the block to secure the block to the barrel. The block is aligned to a gas bore in the barrel through which combustion gases flow and a pair of bores, vertical and horizontal, in the block receive the combustion gases. A key system or a pin system may be used for aligning the vertical bore in the block to the gas bore in the barrel.

1 . Gas block apparatus for a firearm barrel having a gas bore through which combustion gases flow comprising in combination: 
 a first portion including 
 a block having a bottom disposed on the firearm barrel and a rear face,  
 a first bore in the block extending upwardly into the block from the bottom,  
 a second bore communicating with the first bore and extending to the rear face;  
   a clamp portion having a top disposed on the firearm barrel and aligned with the block;    means for aligning the first bore of the block with the gas bore in the barrel through which the combustion gases flow; and    means for securing the clamp portion to the first portion.    
   
   
       2 . The apparatus of  claim 1  in which the means for aligning the first bore of the block with the gas bore in the barrel comprises a slot on the barrel and a key on the clamp portion, and the key extends into the slot.  
   
   
       3 . The apparatus of  claim 1  in which the means for aligning the first bore with the gas bore in the barrel comprises an alignment pin on the clamp portion and a hole in the barrel, and the pin extends into the hole.  
   
   
       4 . The apparatus of  claim 1  in which the means for aligning the first bore with the gas bore in the barrel comprises an alignment pin on the barrel and a hole in the clamp portion, and the pin extends into the hole.  
   
   
       5 . The apparatus of  claim 1  in which the means for securing the clamp portion to the first portion includes a pair of screws extending between the first portion and the clamp portion.  
   
   
       6 . The apparatus of  claim 1  in which the second bore receives a tube through which the combustion gases flow from the block.  
   
   
       7 . The apparatus of  claim 1  in which the first portion further includes at least a single set of rails for securing desired elements to the block.  
   
   
       8 . The apparatus of  claim 1  in which the first portion further includes a plurality of sets of rails for securing a plurality of desired elements to the block.  
   
   
       9 . The apparatus of  claim 1  in which the means for aligning the first bore in the block with the gas bore in the barrel includes a pair of recesses on the barrel and a pair of screws disposed in the recesses and extending from the clamp portion to the first portion.  
   
   
       10 . The apparatus of  claim 9  in which the means for securing the clamp portion to the first portion includes the pair of screws disposed in the pair of recesses and extending from the clamp portion to the first portion.