Christie Signs Bump Stocks Ban On Last Day In Office reports:

New Jersey has now banned “bump stocks,” controversial firearm accessories allegedly used by the shooter in last year’s Las Vegas massacre. The devices can be affixed to semiautomatic riffles to allow them to fire bullets, mimicking automatic weapons.

But under the new law — which takes effect immediately — anyone who owns one has 90 days to surrender them to authorities. Retailers have 30 days. Christie, a Republican, signed the law even though he has long opposed new gun-control measures in the state.

UPDATE: Breitbart is furious. Hooray.