Originally Posted by Meanie5470
My gas block has 2 allen screws on the bottom clamping the block to the barrel, That would mean its not pinned right? The top of the block is a rail section not an a frame.
I have heard that drilling a little of the barrel under the allen screws will help lessen the chance of the block moving. If it were me, I would have it pinned on by ADCO, if I felt I couldn't do it myself.
I prefer this way:
But this way is the best way if it already had a FSB installed: