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Mfg Item #: BT-30BJ
Breakthrough Clean Brass Jags are machined to specific calibers for precision fit. Each .30 / .308 caliber / 7.62mm brass jag is stamped with caliber #8/32 thread for attachment to Breakthrough Clean stainless steel rods. Standard #8-32 thread (standard shotgun #5/16-27 thread on 12g).