If it looks like the piece on the bottom of the hinge it is factory. I don't remember the size for sure but want to say it's a T40 or T50. I pulled mine off on 7-3-14 and have never put them back on.
You'll just unscrew them like this.
Then you will be left with this.
After that you will need to unplug the connector up under your dash and unhook the strap off of the hook on the body side. Be careful though cause once that strap is unhooked your door can swing around and the mirror will hit and dent the cowl area.
Then open the door between 45 and 90 degrees and just lift up. It might take some back and forth while lifting up if the doors have never been off or if it's been a while between times they have been off. Some people have had to get a jack and a block of wood to get them to lift off also.
Good luck.
All of the pics I stole off the internet and are not mine or my jeep.
