Justin Sly of Mark V assembly, polishing a Mark V receiver to a high-gloss finish. High gloss Mark V's are the most challenging to assemble as the slightest scratch will mean re-polishing and re-bluing the part. Many hours are required for just the polishing alone.
Mark V assembler Eric Hansen bead blasts Mark V parts for a matte finish. After getting hand-blasted, the parts will go through another machine operated blaster, then to the high-temperature bluing tanks.