I bought an AR10 a while back.  I am now replacing the barrel.  When removing it, I noticed this logo on the underside of it.  
Looks like an H or an I with something in the middle.
Any ideas?
		 
	
								
								
				
			Looks like an H or an I with something in the middle.
Any ideas?
 
		 
 
		


 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		