plastic unmanned ground vehicles

mass produce plastic unmanned ground vehicles without armor, armed with machine guns that use polymer cased ammunition to reduce weight, armed with cheap missile launchers to give as much bang for the buck as possible 

air drop swarms of those ugvs 

easy to airlift because of light weight because of plastic material, 

easy to set up manufacturing because of use of plastic material, 

cheap to produce because of use of plastic material 

later replace plastic with carbon nano tubes when technology is introduced on the commercial military market