Breakthrough Nylon Bolt Carrier Key Brush, None, .308 (7.62mm)

• Brass core
• Nylon bristles

Breakthrough Clean Technologies Nylon Bolt Carrier Key Brush, AR-10 308 Caliber & 7.62mm, Brass/BlackProduct Features.308 cal. & 7.62mm bolt carrier brushFits AR-10 .308 bolt carriers for precision cleaningStiff nylon bristles easily attack heavy foulingRugged brass core#8/32 thread for attachment to Breakthrough Clean stainless steel rods