Job Description:

• 1) Mounts and aligns ventilated ribs to shotgun barrels to facilitate aiming: Selects and positions ribs to dovetailed posts on top of gun barrel.

• 2) Mounts rib to barrel by dovetailing each rib slot and barrel post along barrel.

• 3) Locks barrel in vise and measures height of rib at breech end, using pin gauge, to determine amount rear end post must be reduced to lower rib to specified height.

• 4) Hammers and files post and squeezes rib slot, using handtools and fixtures, to fit rib to post at specified height.

• 5) Files and fits each rib slot to each post along barrel to align and level rib.

• 6) Stamps identifying data on rib and barrel, using punches and hammer.

• 7) Operates bench drill press to drill holes in barrel for retaining pins and sighting beads.