A Mount Sinai man arrested Thursday after police found a cache of assault weapons and drugs at his home runs a military surplus business and has been targeted by neighbors, his attorney said Friday.

Edward Perkowski, 29, ordered held on $200,000 bond or $100,000 cash bail at his arraignment on drug and weapons charges Friday in First District Court in Central Islip.

Perkowski’s attorney Matt Tuohy of Huntington said his client did not live full time at the home and other people had access to the home.

“They just kind of pinned it on him,” said Tuohy. He added that Perkowski denies any of the material police found belongs to him.

His client may have been targeted by neighbors, Tuohy said.

“There’s a lot of strife on that block with the neighbors. Anything illegal in there my client says it’s not his,” he said after the arraignment.

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Relatives of Perkowski who did not want to be named said the Nazi material belonged to his grandfather who is a World War II veteran. Perkowski owns Valhalla Military Surplus, Tuohy said. Valhalla’s address online is listed as the Miller Place Middle Island home police raided Thursday.

“I can’t speak for what the police do and certainly their business is important and I respect it but, you know, in discussions with my clients and their family they believe it has a lot to do with strife with their neighbors and calls from the neighbors,” Tuohy said. The lawyer, who said he had not seen the search warrant at the time of the arraignment, added that his client spends most of his time in Pennsylvania and stays at the home when he does business in Long Island.

His brother, Sean Perkowski, who also was arrested during the execution of a search warrant, was arraigned on an unrelated bench warrant for public urination. Tuohy said he was in the process of being released pending payment of a $50 fine.

Suffolk County police said the two men were arrested after a 6 a.m. search Thursday, when authorities seized a .40-caliber Glock pistol, six assault rifles, four rifles, 25 high-capacity magazines, a shotgun, a stun gun, more than $40,000 in cash, about 4 ounces of marijuana, about 26 grams of hallucinogens (mushrooms), 14 knives and between 3,000 and 5,000 rounds of ammunition. Police said they also seized a binder containing bomb-making instructions, scales, a cellphone, two computers, and various neo-Nazi paraphernalia and related books.

Edward Perkowski faces six counts of third-degree criminal possession of a weapon, two counts of fourth-degree criminal possession of a weapon, second-degree criminal possession of a controlled substance and fourth-degree criminal possession of marijuana. Prosecutors initially requested his bail be set at $250,000.

Judge Pierce Cohalan ordered him held on $100,000 cash or $200,000 bond. He is due back in court June 21.

The Town of Brookhaven has condemned the home for safety violations.

Suffolk police have not released information on what prompted a search warrant of the home to be issued.