TASER International, Inc. (NASDAQ:

) is up more than 16% today on heavy volume. It's traded over 2.2 million shares, which is more than four times its average daily volume. At last check, shares of TASR were trading at $4.75, a gain of 66‎ cents or 16.14%‎. TASER International develops, manufactures, and sells electronic control devices (ECD) for use in the law enforcement, military, corrections, private security, and personal defense markets.