Masked rockers Slipknot have become the perfect scary act to top the Halloween U.S. album chart.

The group's 5: The Gray Chapter has debuted atop the Billboard 200, ending country music's three-week stranglehold on the number one spot.

The Gray Chapter, the band's first new album since the death of bassist Paul Gray in 2010, sold 132,000 copies in its opening week, and becomes the group's second U.S. number one, beating rapper T.I. to the top spot by over 50,000 sales.

Neil Diamond's Melody Road, Logic's Under Pressure and Florida Georgia Line's Anything Goes, which was last week's number one, round out the new top five.