All Shrewd scopes come standard with 10-32 BHCS bolts for mounting your scope to a variety of sights. For a more secure attachment we offer scope rods that are made for specific sight brands that eliminate movement and make mounting your scope a simple process. When utilizing a scope rod be sure to remove the hex nut found on the outside of the scope. Doing so will allow the square end of the scope rod to locate within a machined pocket on the scope and prevent rotation. To see which scope rod is needed for your sight, check the scope rod product listing and read through the product details.