It's a custom hud crosshair. You would have to find the hud, install the fonts, add some text about fonts from the resource/scripts folder then enable it.

if you're on 1920x1080 res, you should be able to use these without much change other than maybe color. if you're on a different res, this is a starting point.

add this to your hudlayout.res file in your tf/scripts folder.

			"Crosshair_horizontal"
	{
		"ControlName"		"ImagePanel"
		"fieldName"		"VerticalLine"
		"xpos"			"41"
		"xpos_lodef"	"279"
		"xpos_hidef"	"309"
		"ypos"			"240"
		"zpos"			"-5"
		"wide"			"374"
		"tall"			"1"
		"tall_lodef"	"206"
		"tall_hidef"	"212"
		"autoResize"	"0"
		"pinCorner"		"0"
		"visible"		"1"
		"enabled"		"1"
		"fillcolor"		"255 255 255 255"
		"alpha" "15"
		}
					"Crosshair_horizontal"
	{
		"ControlName"		"ImagePanel"
		"fieldName"		"VerticalLine"
		"xpos"			"440"
		"xpos_lodef"	"279"
		"xpos_hidef"	"309"
		"ypos"			"240"
		"zpos"			"-5"
		"wide"			"374"
		"tall"			"1"
		"tall_lodef"	"206"
		"tall_hidef"	"212"
		"autoResize"	"0"
		"pinCorner"		"0"
		"visible"		"1"
		"enabled"		"1"
		"fillcolor"		"255 255 255 255"
		"alpha" "15"
		}

Thank you.
Could you, at least, post your sources about this?

i found a different version a long time ago from a copy of enigma's hud, and i've been using my own version since then.

why would you want this on your crosshair?

Why? Well, i won't tell you :P. Go read about the optic nerve and you'll find out why.

it was question not a negative. thanks for answering miggowh even if you were sarcastic:/

I was not being sarcastic.

polaco is bad dont use it

Who said anything about polaco?
I just used his video to take a screenshot.
You don't make any sense.

i was joking

Eb1c haXXXorzz

posting so I can look it up later

It doesn't seems to work at all :T