A Rebels bikie associate has been arrested and drugs, guns and cash seized during a raid north of Sydney, police say.

Police executed a search warrant on a home on Horace Street, Shoal Bay, on Friday afternoon.

There they allegedly seized a handgun, handcuffs, a baton, ammunition and cash, as well as drugs believed to be ice, ecstasy, steroids, and cannabis.

They arrested a 26-year-old at the house and charged him with 12 offences including three counts of drug supply, several gun offences and dealing in the proceeds of crime.

Police allege the man is affiliated with the Newcastle chapter of the Rebels outlaw motorcycle gang.

He was refused bail in Maitland Court on Saturday and is due to reappear there on Tuesday.