.40 cal - Nylon Bore Brush
.40 cal - Nylon Bore Brush, Our caliber-specific brushes have the size indicated on the stem, ensuring you grab the right brush every time. Our corrosive-resistant Tufcor(R) core wire has a tighter twist for better bristle retention and brush life, plus twice the fill of other brushes with bristles right to the end, meaning you get superior quality and precision cleaning.