Gee Art, I didn't see it as a drive-by.
The intent is to provide some levity concerning some the current AR-15 magazine buying frenzy. That has certainly been the subject of many posts in this fine forum.
Reference to Brownells in the title was perhaps not enough. Sorry about that. You may lock it if you wish.
“There’s a rattle in my glove box,
A Federal twelve-gauge slug.” – Adam Carroll in song Porter Wagoner