Barrel brush nylon .30/.308/7.62mm long guns

Caliber .30, .308 and/or 7.62mm long guns, barrel brush with nylon bristles, brass core with rounded head, external thread #8-32Inch, Premium Heavy Duty Type Code 30NR Pro-Shot USA.
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Note from Pro-Shot USA:
The Premium Heavy Duty barrel brushes with nylon bristles from Pro-Shot feature a tightly wound brass core and oversized, extra thick bristles.
Some pistol manufacturers recommend the use of barrel brushes with nylon bristles for their barrels.
The thicker and stiffer bristles allow for effective back-and-forth movement and quickly remove even heavy dirt.