Since 1977, KleenBore has been known worldwide for Quality Firearms Cleaning Kits, Cleaning Rods, and Accessories In January of 2020, ProShot Products acquired KleenBore With this recent acquisition, ProShot has reinvigorated KleenBore with the return of many KleenBore enthusiasts favorite products KleenBore M16C 223556mm Chamber Brush, 836 Threaded Coupling 026249000960.