RailKing Trains is a product of MTH Trains and is their best selling line. Railroad enthusiasts love MTH RailKing products for their ability to negotiate tighter curves, which is a great advantage for model enthusiasts with smaller layouts and tighter curves. Running and operating on O Gauge track RailKing has become so popular among railroad enthusiasts that oftentimes locomotives both diesel and steam will sell out quickly upon release. RailKing rolling stock includes boxcars, gondolas, reefers, operating action cars, tank cars, husky stack cars, hoppers, and passenger cars is highly sought after. Diesel and steam locomotives featuring Proto-Sound 3.0 are among the most popular model railroading RailKing items. RailKing locomotives have the richest set of features in Model Railroading with vivid sounds and multiple unit capability. RailKing trains are fully compatible with all operating systems. Train enthusiasts shop Trains And Toy Soldiers for the latest diesel and steam locomotives along with accessories and rolling stock.