I'm not 100% sure if this is right but it sounds like the song
[ Tab from: http://www.guitaretab.com/a/anti-flag/33870.html ]
verse 1/ verse 2
E |--3--------------3----3-----------------------------------------------------
B |--3----3----3----3----3----3---3----3----3----3----3------------------------
G |--0----0----0----0----0----0---0----0----0----0----2------------------------
D |-------2-------------------2---2---------2---------0------------------------
A |-------0----3--------------o---0----3----0----3-----------------------------
E |--3--------------3----3-----------------------------------------------------
| |
7x repeat | repeat 4x each palm mute everyother|
chorus
E |----3--------------0--------------------------------------------------------
B |----3----3----3----0----3---------------------------------------------------
G |----0----0----0----0----2---------------------------------------------------
D |---------2---------2----0---------------------------------------------------
A |---------0----3----2--------------------------------------------------------
E |----3--------------0--------------------------------------------------------
and thats it
just listen to the song to get the rythm