Its easy, except removing the taper pins for the front sight. I ordered the kit for holding your rifle in a vise, and a yankee hill lightweight forearm. Unscrew flash hider, knock out sight base pins, remove sight base (leaving gas tube attached) and then unscrew the barrel nut. I left the barrel in place and unmoved to help me not screw anything up. Install new nut, tighten the hell out of it, line up the hole for the gas tube, screw on forearm with blue loctite, install front trim piece with blue loctite, slide on front site base and repin it. Easy as pie, took me less than an hour with my dad's help, and he knows prolly less than me! Hopefully the zero wasn't affected, or won't take much to readjust. Now I just have to file fit my tango down battle grip and I'll be good to go.
If anyone needs the action clamp or magazine well clamp, I have them along with some punches and a barrel nut tool from YHM. I might even be persuaded to help if you have a vise....