Since LMR barrels were used by all post war contractors (so I've read), I am trying to see if the LMR on my HRA is an original or replacement. If you've got nothing better to do, please review the following photos and help me ID a few things.
First, the complete view- Where's the proof mark punch?
What's to the left of the LMR stamping? A "J"? Does it mean anything?
The heat lot "A40"? What's the dimple? Is that an "M" to the right of it? Does it stand for anything?
Is that an acceptance punch mark just to the left of tapering? I know it's not a good close-up shot but it looks to be a DOD 3-star eagle mark.
Where's the HRA receiver heat lot number? Is it the "T"?
Thanks for taking the time and I look forward to your replies.