This is the SMG3 from the Half-Life 2 Leak this weapon was used in the Leak by the Elite Combine Soldiers and the Combine Assassins it's more powerful than the SMG2 and the regular SMG and it has a slower fire of rate and does alot more damage than the other SMGS.
Playermodel Fixed (Playermodel holds weapon right)
A Remade model
Materials from Leak
Valve - For making on the original SMG3
Anders - For remaking the Model of the weapon and adding some Lua to it.
Me - For uploading it to Garry's mod.org (Anders can't upoad stuff)
All you need to do is to extract this to the Addons folder and you are off.