FEATURES-Fits Browning A-bolt 3 Pierce Actions (8-40 screws) Savage round receiver 8-40 screws-Low profile design allows use of iron sights when optics are removed-Full width & 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