Breakthrough Clean BT40NBB Nylon Bristle Bore Brush .40 Cal/10mm #8-32 Thread

The Breakthrough Clean BT40NBB is a dedicated nylon bristle bore brush built to scrub the bores of .40 caliber and 10mm pistols. From Breakthrough Clean Technologies, it pairs a rugged brass core with stiff nylon bristles that cut through heavy carbon fouling and stubborn buildup in the barrel.

Sized for .40 S&W and 10mm Auto pistol bores, the brush threads onto any standard cleaning rod using the common #8-32 thread pattern. The rugged brass core holds the bristles in firm contact with the bore wall as you work the rod through the barrel, making it a reliable tool for breaking up caked-on fouling during routine handgun maintenance.

Designed for regular handgun maintenance, the BT40NBB fits naturally alongside Breakthrough Clean's solvents and patches. It is a compact, single-purpose tool for any .40 or 10mm pistol owner's cleaning kit, used with a bore solvent to loosen fouling and followed up with patches until the bore comes out clean.