It’s important that you have a ½ inch wrench in order to loosen and tighten the nuts on the left side with a 65-inch/pound tightening, as recommended by Burris themselves. Before you tighten the scope to the receiver, adjust the scope’s position for eye relief from 2.5 to 3.5 inches. The scope is compatible with a Picatinny rail, and the mounting bracket is removable and can be easily attached to the scope via two screws.