There were between hundreds and thousands that turned-out all across the country. Doubt you'll see a total count as there were so many gatherings....and I'm sure lame stream media doesn't want the sheeple knowing Zero is lying to the public about "who" wants gun control of any sorts. Then again, Zero probably personally called EB and LT since they're all such good pals and always seem to have the "inside scoop".

Firearms owners, advocacy groups rally against tougher gun control measures during 'appreciation day' | Fox News

You could Google state by state, and might get an idea, but a few states and numbers were given above.