Action Fit: Browning BBR,Hall,Meyer,Whichita 1375,Wichita 1200,BBR-SA,Firearms Development,Alpha,Millennium,RPA Quad Lock Bolt Diameter: .870 Cartridge: 22-250 Remington,243 Winchester Delivery weight: 0.136kg Shipping height: 23mm Shipping width: 23mm Shipping length: 305mm