A professional who sets up and operates planer-type machine to cut matting (knurling) on sighting ribs of shotguns to improve appearance and reduce glare. Respnsibilities include:

• Attaches holding fixtures and matting tools on machine and clamps rib, or barrel with rib attached, in fixture, using handtools.
• Depresses lever to position cutting tool in relation to rib, and starts machine which moves rib under stationary tool.
• Maintains even pressure on lever to obtain smooth cut.
• Turns adjustment knob after each pass to increase depth of cut.
• Removes rib from holding fixture.
• May shim fixture to level workpiece.
• May hone surface of rib to remove burs.