Find out how you can win this Custom Echo1 MTC3 AEG that Brian Holt put together... "The latest contest or giveaway is being held by Brian of Echo1USA for a custom built MTC3. The MTC series is a unique rifle that is using a version 3 gearbox and parts but using the M4 magwell giving the user the best gearbox and magazine options on the market. Brian has taken the next step to build a rifle of the MTC3 with several other parts from the boneyard to make one lucky fan.