Yeah ours is like a 15rd max but it's not illegal to possess or trade "grandfathered" 30rd. So you can't really tell, and some shops will happily point you to the Magpul rack where you can buy a standard cap shell and rebuild kit. You basically have to buy two Magpul bags rather than 1. As far as I know no one has ever been prosecuted only for a mag.

By far the worst part is Magpul left Colorado over it.

Colorado is widely seen as "liberal" now but it's always been just a corrupt uniparty state. Most of the dumb vehicle stuff comes out of the 90s when it was a "red" state and all those dumb weedheads hadn't turned it all liberal. Even when it was red, it was just Bushites.