This is a hammer from an unfired rifle. It has an obvious manufacturing defect but is it cosmetic only or a weakness that will eventually develop into a crack? It is pretty shallow compared to the overall thickness of the hammer.
Edit: Well apparantly Tinypic is no longer supported on this site so here is the link.
Disregard my humor…I agree with above. You should not have a problem getting that replaced, and I wouldn’t want it on a service/hd rifle. If it’s a range gun I say shoot it till it fails and keep the spare in your kit.
My worry about shooting is if the hammer shatters while the BCG is cycling the pieces go up into the upper receiver. I’m not sure if it could damage the upper or not in that case.
When you think about it that is doubtful. At the point the bolt is unlocked and the BCG begins to cycle the forces are contained by the buffer spring. Likewise, as the BCG moves forward it is powered by the buffer spring. Looking at it in that context, it doesn’t seem as though there is enough power to fling parts about with enough force to damage things.
All that aside, I’d replace it. If it breaks you are going to ruin a range trip. I generally like to do such parts replacement in the comfort of my shop rather than in the wild. Heated in the winter, and shady with fans blowing in the summer.