What are the width of the slots on the Smith Enterprises Vortex? I bought a vortex from Bushmaster, they said it was genuine. It came in Quality Parts packageing, and didn't look quite right. I called Smith Enterprises, talked with the guy who machines them, he said the slot is .250" wide. The vortex I got from Bushmaster has slots .235" wide. Do any of you have the genuine article? If you do would you measure the slots and post findings here. Thanks in advance, beemvic.