If you choose to mount a riflescope yourself you will need a few things first. A gun vise of some kind and a clean, well lit area. Remove any filler screws in the top of your receiver with a properly fitted screwdriver. Degrease the holes. This of course does not apply to grooved receivers or integral Weaver/Picatinny bases. Degrease all mount parts, then reapply a light coat of oil to the top of the receiver and the bottoms of the bases or rings. Check the instructions for your particular mounting system. Some manufacturers that use Torx screws suggest a light coat of oil on the screw threads. I normally use Loctite on all base screws. Never Loctite ring screws. Always apply to the screws, not in the threaded holes. Some bases will have screws of different lengths. Check them first visually. Make sure the screws are in the correct places. Screw threads should protrude about the same amount from the underside of the bases. Putting too-short screws in the wrong places can result in a scope being torn off by recoil or handling, and screws that are too long can bind a bolt or result in a loose base. Install the bases using Loctite or oil, depending on what the manufacturer suggests. A tiny dab of fingernail polish works well when Loctite is not available. Tighten securely.