Seriously... Time to hold them to the fire. All in or fold. All or none. You can bet the communists will backtrack instantly and it will not be mentioned again. They will think twice when their own security cannot legally carry to defend them.
I regard that idea as a high-risk proposition. Leftists cannot be shamed into being logically consistent and it does not matter anyway.
Leftists want us disarmed. They will promise anything that might get us to disarm voluntarily. They don't need to deliver on those promises and they won't. They will never give up their own armed minions. They need them to enslave and kill their opponents.