Their proposal is about getting lines like this ratified:

"No person, firm or corporation shall sell or deliver any three-dimensional printer in the state of New York unless such printer is equipped with blocking technology," https://www.nysenate.gov/legislation/bills/2025/S9005

They don't like firearms in the hands of the public.

The goal is to be an indirect ban that's hard to challenge. California has had significant success with strategies such as requiring "microstamping technology" (but it could be anything - it's just a limiting mechanism) in conjunction with an approved handgun roster to limit handgun sales in the state. This is almost certain to be a similar strategy.