A pensioner was hit over the head by a crowbar and threatened with a handgun but still managed to scare away two attackers a quarter of his age.
The 70-year-old man answered the door to his Burgess Hill home on Monday night expecting to see his visiting relatives but instead was confronted by two young men.
One of the teenagers hit him over the head with a crowbar and demanded money while the second attacker pointed a handgun at him.
But the pensioner refused to be cowed and grabbed a kitchen knife at the sight of which the two men ran away.
The pensioner, who was with his wife at the time of the attack, was taken to hospital to receive treatment for a cut to his head and finger.
The attackers are described as slim with one about 17-19 years, 6' with a dark, swarthy complexion while his accomplice was shorter.
Detective Sergeant Laura Diamond said: "This was a brutal attack and we are supporting the couple following their ordeal.
“The man opened the door just after 7pm that evening as he thought it was a member of the family visiting and bravely confronted his violent attackers.”
Anyone with information is asked to contact Sussex Police on 101, email firstname.lastname@example.org quoting serial 1161 25/8.