That's BS. They are violating the law ... which you posted.
Their rationalization doesn't hold water. There is nothing in the law that prohibits having parts that "could be combined" into an illegal firearm. I believe that's called Constructive Possession -- possessing the parts and having them in close proximity so as to be able to construct an illegal firearm. This usually applies to parts like full auto sears.
Any rifle LOWER with a legal UPPER can be "easily changed" with an illegal UPPER whether the lower is a rifle or pistol. The upper has nothing to do with the function of the firearm until you actually fit them together.
I'd ask for that information in writing from HPD. Getting the information secondhand from a LGS could be problematic. Did you not learn already that even gun dealers get it wrong? (refer to your previous LGS who required your rifle permit for the transfer)
Oh yes, I definitely learned that from my previous LGS.
& I agree with what you said. You can’t stop a person from doing something because he/she MIGHT do something illegal later on.
What stops a person from doing something illegal? The law and the persons choice to follow it.
It’s just how I see it. Others may see it differently 🤷🏾♂️