Insurer Chubb and broker Lockton are under fire in the US for partnering with the National Rifle Association (NRA) on an insurance policy for gun owners who shoot someone and claim self-defence.

NRA Carry Guard, introduced earlier this year, includes criminal legal defence, firearm replacement, clean-up costs, payouts to bail companies and a 24-hour legal hotline.

Coverage options run up $US1.5 million ($1.92 million) in civil protection and $US250,000 ($320,266) in criminal defence.

The policy has angered campaigners who believe it will encourage NRA members to “shoot first and ask questions later”.

Gun control activists Guns Down and racial justice organisation Colour of Change are petitioning the two companies to abandon the policy. A video posted on their website – stopmurderinsurance.org – features an appeal by Sybrina Fulton, the mother of 17-year-old Trayvon Martin, who was shot dead in 2012.

The website says Lockton and Chubb are “perpetuating fear of minorities and immigrants, and by offering special protections to gun owners who shoot first and ask questions later, these insurance companies are promoting gun violence”.