Here is Tang of Jag Precision showing you some of the new features the Echo1 Troy Industries TRX series... "The Echo1 Troy series has been updated now with some great new standard features that make this an excellent durable starter gun. Metal body, TRX rail system, battle axe stock, 8mm v2 gearbox, metal piston rack, and a host of other features make this gun an excellent value out of the box."