Looks like an air bubble. I have seen them in castings and in rolled plate but never in gun parts. Can't tell from the photo how deep it is. If it is very deep it could be a serious safety issue. JSR
1 - 1 of 1 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
A forum community dedicated to Ruger firearm owners and enthusiasts. Come join the discussion about optics, hunting, gunsmithing, styles, reviews, accessories, classifieds, and more!