Remington Master Component Pistol Kit - Remington makes gun maintenance practice easier by offering a bulk style replacement kit for your cleaning components. This includes bronze brushes, nylon brushes, jags, and cotton mops. (4) pieces per caliber; .380; 9mm; .40 (10mm); .45 (.44/454); Bronze brush with coated steel twist; Nylon brush with coated steel twist; Brass jag; Brass slotted loop;