I had a Steyr S40 stolen out of my truck on feb 5, 2008. The serial number is 025390. It also has the letters AOW stamped on the same side of the slide as the serial number. The gun is all back with polymer frame and steel slide and features trigger safety similar to the glock system. The scumbags also took a spare magazine for the gun and a cold steel gunsite knife as well. This gun should stand out as there were not a lot of these sold here in the states.