Evolution Ghost XS EMR S Carbontech ETS IIEvolution Ghost XS EMR S Carbontech ETS The Ghost XS EMR S by Evolution International is a great CQB rifle with a polymer body and many upgraded features compared to many models on the market. It comes installed with Evolution's own electronic trigger system, as well as a quick change spring gearbox which allows you to remove the spring without having to take the gearbox out of the lower receiver. Features: Air nozzle: High grade Battery Plug: T plug