Axon Enterprise (AXON -1.96%) posted another year of impressive growth and indicated it sees no sign of a slowdown ahead. Investors are buying in, sending Axon shares up 12.5% for the week as of Thursday afternoon, according to data provided by S&P Global Market Intelligence.Axon's strong record of outperformance powers onAxon began as a maker of non-lethal Taser stun guns for law enforcement and has spent the last few years widening its portfolio to include body cameras and software systems to manage evide ...