Look, a original artwork:
http://media.photobucket.com/image/n...CG%20R2/58.jpg
If you see, a BIG handgun, like a 45 caliber.
For Suzaku, yes, he's enough obsessed and paranoid, he was ready about his destiny like zero after killing Lelouch, he never accepted the new future C.C written for them.
He feel himself a guilty, he doesn't want the right to redeem himself...after 12 years he still continue to be attached to Euphemia.