Here’s some family values that only the Hatfields and McCoys can support.

Cops arrested a Brooklyn father, mother, son and family friend for keeping a massive arsenal of handguns, rifles and knives inside their home across the street from an elementary school, officials said today.

Officers seized 10 handguns, 2 assault rifles, 9 regular rifles, 9 shotguns and 2 air guns yesterday from a house on 2438 West Street in Gravesend, where they arrested Thomas Siano, 57, his wife Kathleen, 57, their son Vincent, 30, and roommate Michael Poole, 27.

Cops also grabbed a pile of pills, a large quantity of ammunition – including home made ammo – and enough bladed weapons to make a pirate movie, including, 2 daggers, a machete, a sword, a hunting knife, and umbrella with a secret dagger in the handle.

The bust was made after cops executed a search warrant at the home, which sits across from PS 216, which has classes from pre-kindergarten to fifth grade.

Neighbors said the family had lived in a subdivided 5-unit home in the neighborhood for years. Thomas Siano is a plumber, while is wife is a homemaker and son is unemployed, neighbors said.

Some neighbors felt the bust didn’t surprise them.

“I know they are nutty,” said a neighbor. “They are always hanging out on the steps. I was scared, but definitely glad the problem was solved because I defiantly don’t want to bring up a family with those kind of people next door.”

Charges were pending, as the Sianos and Poole were awaiting arraignment today.