Does anyone have any ideas what do the markings mean? http://6.firepic.org/6/images/2015-07/29/cf5ixlxzcwj1.jpg http://6.firepic.org/6/images/2015-07/29/fdqedqwxn8t5.jpg Also, the rail should be steel, because it is 'labeled' as such. Can anyone tell me what the "F.V.C.L" in the markings o...