Old Jalopy
.45 acp
So, I read through the whole CCIA again:
www.nysenate.gov
And unless I missed it, I cannot find anything about ML's in the bill as written.
Then we have this (which I think was around for a while before the CCIA):
The way the above reads, you don't need a BG check for a ML unless the gun is like the TC models, where you can easily swap parts to make a single shot rifle or shotgun that loads from the breech. But your run-of-the-mill CVA Wolf (as an example) should not require a BG check.

NY State Senate Bill 2021-S51001
Relates to licensing and other provisions relating to firearms.
And unless I missed it, I cannot find anything about ML's in the bill as written.
Then we have this (which I think was around for a while before the CCIA):
The way the above reads, you don't need a BG check for a ML unless the gun is like the TC models, where you can easily swap parts to make a single shot rifle or shotgun that loads from the breech. But your run-of-the-mill CVA Wolf (as an example) should not require a BG check.