MSP doesn't have a standard. There is nothing written in COMAR. MD passed the buck to FFL's and manufacturer's.While I'd tend to agree that your description, in fact, describes a heavy barrel, can you provide some sort of objective evidence that the same definition is being used by MSP?
I ask, not to be an a$$, but because elsewhere on MDshooters, I've seen that the only hoop is that the barrel maker stamp their barrel with "heavy" "HB" "HBAR" or similar, or that their literature of the barrel describe it as "heavy".
This would seem to be different standard than your otherwise reasonable description of a heavy barrel.
And I'm not sure which is the description that MSP will use if....things are not peachy keen.
-M
edit: I'd like to point out that I'm not questioning Engage's practices; from what I've seen they actually meet both standards: it is at least 0.750" for the entire length and it's stamped HB.
my only question is which of those two is the standard MSP uses.
Get an AR from Engage and don't worry about it. They make a kick ass AR.