Deputy Commissioner Michael Clement says police are working with gun-owners to ensure they can safely store their soon-to-be outlawed weapons until they can be collected as part of the uplift programme.
Clement said the new legislation that will become law tomorrow makes big changes to the gun laws in a short amount of time, so licensed gunholders must be patient while police work through the collection process.
"The main change is the prohibiting of a large number of semi-automatic firearms, parts, and large-capacity magazines," Clement said.
"There will be very few exceptions to this - only collectors, dealers, and people who undertake wild animal pest control will be able to apply for exemptions."
"For people who find themselves now in possession of a prohibited firearm, we ask you to please notify us online at the Police website.
"The collection of firearms will occur at a later stage.
"For now, there is an amnesty in place and we ask people to please notify us."