While I agree that a good number of non-management (and even management and elected positions) police are supportive of gun rights, I think Armalite is misrepresenting how those individual officers might feel about the inability to purchase Armalite's goods.
If the individual officers support gun rights, I would hope they think like me and many gun owners I know. As a resident of CA I fully support gun industry decisions not to make goods and services available to CA. Yes, it hurts me a bit in my inability to purchase some things, but I recognize it as a greater good in the fight to preserve our rights. The individual, freedom supporting officers Armalite talks about, would, I hope concur.
I have found one of the primary holes in our gun rights armor is the "law enforcement exemption". Individual police officers who support gun rights should not support that exemption, and they should make it known to their unions and their management.