i suggest that for the weapn attachments, they would be able to work like having a laser sight, having a long laser that points in the direction of the aim, and an idea of scopes would to be able to move the screen in the direction of the curser, further than the character is, [like pressing ctrl in starbound] i also suggest having an attachment for rifles and shotguns that allows alt fire to shoot a grenade, a grenade launcher attachment.