Para Headache!

I’ve made a few mistakes over the months of being the new guy for garry’s mod but i can’t take this anymore! last year i downloaded the " dual mp9’s a replacement http://www.garrysmod.org/downloads/?a=view&id=24669 for the cs:S Para m249 gun ( which in return i super regret upon) I have try removing all files for the files for this replacement but the duals are still there! if anyone can help me figures out how to replace it or better yet restore it to its old m249 i would gladly thank you more times than u could handle :confused:
steam name is bt76 btw