Make no mistake. This is a Confiscation bill. No grandfathering for most stuff, and nothing I can tell after 1994 purchases. After the law you will get a court order to turn in what they already know you have. At their convenience.
They know about you pistols. They know about any M1A you bought in the last few years. They know about all the ARs you bought or any stripped lower. That information was written down by the gunstore and send to Lanham, as is required already by law.
Let them know they are over-reaching.
I need my reader's help. Call or email OUR senators. These people are a start. If we can stop this in Maryland it will take some of the momentum out of the national push. Use any angle. Tell them you do business here, or travel through here, or have considered being a tourist here when visiting DC. Even if you live in Arizona and never intend to cross the Mississippi you can contact them and say you will donate to their re-election if they vote no. Be brief, firm but polite, I recommend.