Things You'll Need
Instructions
Examine the grooves on the top of your rifle. Look for any debris along the length of the grooves; carbon or dirt can quickly accumulate in small grooves, preventing the scope mounts from slipping on. Clear the grooves with a small brush and gun solvent; wipe off any solvent before continuing.
Use your screwdriver to loosen the mounting screws on your scope bases and spread the edges sufficiently to slide onto the grooves. If the edges are too close together, they will lack the clearance to slip on.
Slide the scope mounts onto the rifle from the back end of the grooves; once your scope is in position, tighten the scope mounts with your screwdriver.