You are right on all accounts -
1. I called S&W and they immediately answered the question
2. It is a Smith & Wesson 11616 M&P15 Sport II *CO Compliant
3. It doesn't really matter (it was a question asked out of ignorance that mostly only the furniture changes between models)
Thank you!
I purchased this used from a local gun store in a bit of a rush since my state is about to restrict the purchase of semi-auto AR style rifles. As you can tell, it had to be spayed & neutered to be compliant.
I normally would have done a lot more research before purchasing my first AR but this...