Laserburn was a set of rules and miniatures for science fiction figures in 15mm. The rules were written by Bryan Ansell and figures apparently sculpted by him as well and sold under Tabletop Games banner. The vehicle range is limited but reasonable. The vehicles have a comic book flavor to them and are still available online. These do not have the fine machined surfaces of vehicles like the GHQ line but work well with Traveller which also initially used 15mm figures.