R1 rifle version of the SMG1 weapon model request

Wel my idea was to transform the SMG1 into a rifle wich i am calling a R1 so it would look kinda like this:
http://img228.imageshack.us/img228/135/76789410.png

I know its a kinda cheesy drawing but you get the idea.

BTW I don`t really need a view model only a world model.