I have to go with the Saiga-12gauge as my choice of wepon. It has a detach grip btw is fucking awsome
http://club.guns.ru/eng/sig12/4.htm
Even thou the ak47 kick ass and doesnt jam its not a very accurate for shooting I always been the shotgun type you can pick one of thos bad boys for
300.00 dollars.
Heres another shotgun to ad for you guys
http://www.keepshooting.com/images/pms12griptext.jpg