Warne Remington 700.554 inch Extension Matte M904M Remington 700 - .554 inch extension Full width and depth recoil slots provide maximum bearing surface for recoil key engagement Bases securely mount to your firearm with Torx-style T-15 Socket cap screws, 25 in/lb. of torque is recommended Precision machined CNC from solid steel Low profile design allows use of iron sights when optics are removed