The S&W 1500 is the exact same rifle as the Mossberg 1500, the Weatherby Vanguard, and the Howa 1500. It was made for S&W by Howa and any stock for any of these will fit your S&W 1500. You can get a factory Howa replacement stock from Legacy Sports International or a after market stock from Brownell's. McMillan, H-S Precision, Bell&Carlson, High Tech Specialist, Ram-Line, and a couple others, make synthetic stocks that wil fit your 1500.