Description
MP5SD/ AR9SD enhanced barrel port cleaning brushes. These are needed to clean the carbon from your ported barrels so that your silencers do not get locked on the barrel. They are made of Aircraft Aluminum with a steel brush insert and are user serviceable. These are a much easier way to clean your barrel than the Factory HK port brushes that screw on to your silencer. We recommend using them every 400-500 rounds.
