Anyone have a clue as to why that would be the case?
Might be the fact that Armalite doesn't cover hinge breakage under warranty.
And they don't make them anymore. I don't think they had much enthusiasm for them when they did. (Armalite has a vendor table at our club's open house most years, to show off their wares. I've not seen them bring an AR-180.)
"As was the man of dust, so also are those who are of the dust, and as is the man of heaven, so also are those who are of heaven. Just as we have borne the image of the man of dust, we shall also bear the image of the man of heaven. "