Otis 338-357cal Brush/mop Combo Pack

The Otis 338-357cal Brush/mop Combo Pack is a dedicated bore maintenance system designed for rifle and magnum handgun calibers. This two-piece combo delivers both a bronze brush and cotton mop in a single package, enabling operators and precision shooters to run complete wet and dry cleaning cycles without carrying redundant tools.

The brush clears powder fouling and copper jacket residue from the bore, while the mop follows with solvent saturation to lift contaminants and prepare the bore for rust protection. The combo format matches the 338-357 caliber range, fitting rifles chambered in .338 Lapua Magnum, .338 Federal, .357 Magnum, and similar bores. Otis tool components are built to military specification for field durability; the brush bristles maintain shape through repeated cleaning cycles, and the mop absorbs and releases solvent evenly without shedding fibers into the barrel.

This combo pack serves precision rifle shooters, tactical marksmen, and LEOs who maintain magnum rifles on duty or at the range. It integrates with the broader Otis modular cleaning rod system, allowing shooters to build custom cleaning configurations without purchasing full kits. The dual-tool approach reduces bore cleaning time compared to single-tool sequences, and the compact footprint fits portable cleaning kits for field maintenance during extended operations or training evolutions.