Extra Dimension LOC Barrels fit all stocks and receivers, right- or left-hand. They"re packaged with the correct magazine group (magazine and housing). Barrels are stamped with series letters: A, B, C or D to help you easily identify the correct magazine group (magazine and housing) and bolt required. Specifications: - Model: Dimension - Finish: Blued - Caliber: 7mm Remington Magnum - Length: 24" - Series: D