12-13-2013, 01:18 AM
LRRPF52 Wrote:The lapping tool is the only practical answer I can come up with, but I'm sure a tool or die maker has $100's in tools that could probably pull it off as well.
The $22-$27 lapping tool seems like a much better option to me.
I have the lapping tool and have used it on a couple Spike's forged uppers with what I consider success. I'm about to assemble an upper on a Mega billet receiver and am concerned about using the lapping tool to check that it is true. If I spin the tool, it will remove the anodizing and open up the possibility of corrosion. Can I assume the Mega billet upper is true? Is corrosion an issue?
While I'm here...This is my first high end billet upper assembly. Will I need to use a torch to get the extension to mate with the receiver? Could one of you experienced guys elaborate on this process?