That's just more right-winger code for...whatever it is right-wingers see as being... what reality is. :shrug:
An ammo tax would be an example of taxing gun ownership and/or use into unaffordability.
http://www.opposingviews.com/i/society/guns/california-approves-92m-ammo-tax-combat-gun-violence
Along with regulations on magazine capacities, long gun specifications etc. Heard one person during a DNC interview pushing for a 30 day waiting period to pick up a gun purchase.