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This innovative device utilizes a turbocharged impeller, powered by a single CR123A lithium battery (included), to efficiently cool rifle barrels, reducing their temperature to optimal levels in under 7 minutes. Not only does the Riflekühl's extendable nozzle effectively push airflow down the bore, but it also doubles as a chamber flag and contains a built-in air filter to prevent debris from entering your rifle. Step up your shooting game with the advanced technology of the MagnetoSpeed Riflekühl Barrel Cooler.