MAKO Surgical (NASDAQ:MAKO) is down before the open this morning on after-hours release of Q2 sales figures and lowered 2012 outlook. Six-month sales of the company’s RIO system for use in knee and hip operations are down 25% from last year and the company cut their sales outlook for the year from more than 50 units, to between 42 and 48. After lowering sales expectations in May, MAKO shares lost more than 35% and the company was hit with a class action lawsuit contending that MAKO had withheld information from shareholders. The company has been bouncing around $24 since then, but after Monday’s announcement shares shrunk 40% to $14.50 this morning. Shares are likely to continue down slightly this morning as trading volume increases.