Rifle barrels being straightened. Rock Island Arsenal, Rock Island, Ill, August 23, 1918.
Record Group 111: Records of the Office of the Chief Signal Officer
Image description: Two men standing in a workroom amid racks and racks of rifle barrels. The men are each holding up a rifle barrel to look through it. The barrel is held in an umbrella-shaped contraption which is probably turned to straighten the barrel.
Image description: A large light workroom with many racks of rifle barrels in it. Several men look through rifle barrels.
Source: catalog.archives.gov