Quote Originally Posted by Geezer View Post
He's got a point. That looks to me like an Omega stock. For one thing, from memory, the standard Vulcan one did not have grip chequering. In addition, the Omega cheekpiece has a little "swoosh" cut out at the front, and a squarer thicker area at the top of the grip for the sliding safety to move above. All of which appear present here.
It does look like the Omega stock, as well as the chequering the for end is a bit longer & the shaped pistol grip.