Since lower receivers are serial numbered and handled the same way as complete rifles, I always figured that those sales estimates of lower receivers were included.
How do you know receivers are captured differently?
Whatever the number, it's a genie they'll have a hell of a time putting back in the bottle.
Moon
And then..... all of those 80% lowers ;)
I didn't even think about the lowers and the 80% builds.
I wonder how many of those were bought and then held for resale purposes with out the intent for use, or even if any of those have ever been fired.