Vogel shot USPSA Nationals in Limited division this year with a Glock. I know because I RO'd him when he came thru the stage I was working in St. George.
But BV's Glock was far from stock. It had a piccatinney rail mounted to the right side of the slide and a flashlight underneath. I'm not sure what purpose the pic rail served, but I'm guessing the flashlight was for weight to help the gun shoot flatter. From what I understand, the flashlight was inert and within the USPSA rules for Limited Division, circa the 2014 rulebook.
There's no doubt in my mind Vogel is a great shooter, and watching him in action with the Super Squad was a treat. Was the extra weight on the gun needed? Don't know, didn't ask him, but he was within 1.1% of beating the National Ltd champion who incidentally was shooting a 2011. But the point is, he wasn't shooting a stock Glock at the 2014 Nats.