Are there any table top games similar to Warhammer 40k that you don't have to paint or make the models?

Are there any table top games similar to Warhammer 40k that you don't have to paint or make the models? I enjoy playing Warhammer at my friends house but I hate the fact you have to paint them to make them look good and can't switch out the unit's weapons after you fully made them. Is there anything similar in terms of gameplay that you don't have to build all your units?Are there any table top games similar to Warhammer 40k that you don't have to paint or make the models?
There's a game called Combat Zone with pre painted figures and already built link below



http://www.em4miniatures.com/acatalog/Co鈥?/a>

merchants tire

geronimo stilton