This weekend I got around to building some Armor Grid models at 50% scale, putting them roughly at the size of 6mm models. Here is a light vehicle (from the Motor Pool set) and a forest area (from the Terrain Pack.)
Building the vehicle at this reduced scale required the use of tweezers and I had to print it in regular, 90gsm paper otherwise the small paper tabs became unworkable. The terrain elements were printed in 180gsm cardstock.
I say "roughly" 6mm because I do not have many references about actual vehicle sizes in that scale. From the measurements I saw on the Onslaught Miniatures site, it seems that the medium and large Armor Grid miniatures would be about the same size as their tanks.
This light vehicle is about 2cm long and 1cm wide. Here is a picture with a ruler to have a better sense of scale.
I did this both as a challenge and to evaluate the feasibility of making a whole group of vehicles to play Armor Grid, Strike Legion and other games in 6mm scale. Surely, there are metal miniatures at low prices in this scale, but there are still the issues of availability and shipping costs around here. Based on these results, I am thinking about making my own set of simplified models for 6mm.