Ripcord delivers the best one-pass cleaning you can get for your firearm. Run it through your gun from Breech-to-Muzzle , with no gravity feed necessary. The rigid, helix-shaped rubber core keeps the cleaning surface pressed against the bore, engaging the rifling for an aggressive clean. The braided Nomex surface can take up to 700 degree heat, so you can clean it at the range or in the field while the barrel is still hot. Attach a bore brush to get an even more thorough clean. It's fast, effective and ultra-portable. Nomex is a registered trademark of DuPont . Cleans: .223cal / 5.56mm Rifles Length: 36" 10 inches of aggressive cleaning surface Caliber specific molded rubberized core for 360 degree cleaning Heat resistant up to 700 degrees F Nomex fibers act as both a brush to loosen and a patch to capture fouling particles Easy-feed design makes for quicker cleaning from Breech-to-Muzzle Equipped with 8-32 threaded ends to fit all Otis cleaning components