khaos

Hey guys, I've been trying to gain some info on a shotgun I own. Before purchasing the gun I tried to find some pictures of it but nothing was identical online. My dealer said its a limited run M1 that has a factory muzzle break (only made one year). Any truth to this? Also is it safe to shoot slugs through this gun? I don't have an owners manual should I contact Benelli for one? thanks for your help.