Source (lots of cool photos): http://www.rccaraction.com/blog/2014/09/15/watch-incredible-16-scale-tanks/ Learn More: http://www.spearheadarmorgroup.com/
There is another member here, KAC6A who is in a group like this. Armortek in England has some really interesting stuff and really worth a visit. Armortek UK: http://www.armortek.co.uk