I was with you until you brought up suppressors.
A suppressed AR-15 is still louder than thunder. Literally.
Had the Las Vegas shooter suppressed his weapons, I genuinely doubt the outcome would have changed one iota.
We still don’t even know how many of the dead and injured were shot and how many sustained injuries in the panic afterwards. Trying to suggest a firearm accessory that was not used in the massacre is the real problem speaks to an agenda that existed before the massacre took place, not a reasoned solution.