1. Are all real no5mk1 marked ROF ? None are m47/c?
2. Is it unusual for a No1mk3* (FTR'48) to have no markings on the right side "wrist" behind trigger guard?
3. Can you adjust headspace issues on a No1mk3* using different bolt heads? Why does marstar ask for measurement when you order one? Is this measurement stamped on the head, or do you measure it?
4. Can or should an otherwise good barrel be "counterbored" if there is pitting or corrosion issues at the muzzle?