View Single Post
Old January 9, 2013, 09:35 PM   #2
Ridge_Runner_5
Senior Member
 
Join Date: February 8, 2008
Location: Denver, CO
Posts: 1,906
It's probably a very small hex head. But the gas block is purely for the sight, since the 522 is blowback operated and doesn't need gas to cycle.
Ridge_Runner_5 is offline  
 
Page generated in 0.03952 seconds with 7 queries