Originally Posted by
Brett Kastl
Referring to a barrel, once zeroed in the upper with whatever sights/optics installed, could be removed, then reinstalled, and the barrel, upper, and sights/optics combo would still be zeroed. I don't remember where I read this, it may have been an article by Eric Poole a few years ago. It wasn't a perfect return to zero, but really close, and the specified torque was to achieve a consistent fit of barrel to upper for this purpose.
Is "return to zero" the correct phrase for this concept?