Arrow keys to move around S for safety (the status is in the upper left corner (grey is safe, red is live)) Space to fire (ammunition quantity is in the top right corner) R to reload magazine (safety must be engaged first and every mag has 6 bullets)
I fired a few guns while i was in the U.S. this summer and it showed me that guns, which in my head were never safe, could be well handled. The guy who let me fire his guns was a friend's dad and he took safety seriously. He would say things like "Always point the guns down-range.", "Unless you're about to fire, leave the safety on and keep your finger out of the trigger well.". We had to load our own magazines (no small feat for a first-timer BTW) put them into the mag well, then position ourselves so that the gun would be balanced and steady (FYI, one was steel and wood, and was sooooooo heavy, my arme was cramped even two days later). So now that you've read this, get on with it, and with the spirit of AC/DC, Fire Your Guns!