if so why is the ammo called 2mm EC and I do know that it is a Railgun (also I am very sorry if I am stupid)
2mm Energy Charge I believe, The round and power supply were in the same cartilage.
(Also they are coilguns, not railguns ... there is a difference but that is nitpicking a bit)
Bethesda made it a Energy Weapon in Operation:Anchorage, their rational was there was no Sniper Energy Weapon so they made the Gauss Rifle one (by giving it a scope and mark it as a Energy Weapon) and honestly I do not see what is the big deal about it as the round is accelerated to such speeds that will act far more as a energy weapon that as a gun (since its not going to be much influenced by wind and gravity due to its speed).
Also I am going to point out that Gauss weapons were the high end of Small Arms as Pulse weapons were the high end of Energy Weapons, none were scoped, in fact there was no scoped energy weapon until Fallout 3.