Otis Elite Gun Cleaning Kit. Otis Elite Gun Cleaning Kit. Designed to clean and maintain all rifles, shotguns and pistols from .177 caliber air pistols and BB guns up to .50 caliber BMG and 10 gauge shotguns. Includes over 200 pieces: T-handle, large obstruction remover, small obstruction remover, shot gun brush adapter, small and large patch savers, .22 caliber slotted tip, .30 caliber slotted tip, shotgun slotted tip. Otis Precision .22, .25, .27, .30, .35, .38, .41, .45 & .50 caliber bore and chamber brushes in protective tubes. Otis Precision .410, .28, .20, .16 and .12 gauge brushes in protective tubes. .177 and 22 caliber short brushes. 100 all-caliber patches, 50 small-caliber patches, 36