Anyone buying a knife online will be banned from having it sent to a residential address, under a government crackdown following a surge in street stabbings.
New legislation, to be brought forward within weeks, will also make it illegal to possess zombie knives and knuckledusters in private – or any knife on further education premises.
Rapid firing rifles will be banned and the legal definition for threatening someone with an offensive weapon changed to make prosecutions easier.
The measures – which also include a ban on acid sales to under-18s – will all be included in a new “serious violence strategy”, to be launched by the home secretary, Amber Rudd, on 9 April.
It follows six shootings and stabbings in London in the past week alone and more than 50 murders in the capital in just the first three months of the year.
The strategy will mark a “major shift in the government’s response to knife crime and gun crime”, Ms Rudd will argue, while striking “a balance between prevention and robust law enforcement”.
“This government has always stood for law and order and to tackle violent crime effectively, robust legislation and powerful law enforcement must be in place,” the home secretary said.
“That’s why we will introduce a new offensive weapons bill that includes a new offence of possessing acid in public without good reason, prevents sales of acids to under 18s and stops knives being sent to people’s homes when bought online.”
Ms Rudd also insisted the government is fully behind the police wish to use stop and search powers, after one of Britain’s most senior police chiefs said the backlash against them had gone too far.
She added: “Stop and search is a vital policing tool and officers will always have the government’s full support to use these powers properly.”