A new barrel dampener is now on the market from Bowjax.  Designed for the AR-15, the company claims it “…reduces barrel whip and increases accuracy.”  The barrel dampener is a slip-on device that can be used on gun barrels with an inside diameter of 0.75 inches or greater.

The devices come in packs of three and sell for $9.99.  They can be had in red or black.