Ruger M77 - Manual (Page 24)

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MAINTENANCE OF STAINLESS STEEL RIFLES
Firearms and components made of stainless steel are relatively more resistant to
corrosion than those of blued steel. However, in the interest of proper operation
and long life of a stainless steel firearm, inspect it frequently and clean, lubricate
and apply an appropriate rust preventative.
Sometimes discoloration occurs from perspiration or from contact with some
types of gun cases. Rusting may occur as a result of the firearm being exposed to
moisture, salt air or chemicals.
Minor discoloration can usually be removed by rubbing the stainless area with an
abrasive ink eraser, crocus cloth, or a “metal polishing” compound. When using
any of these abrasives, proceed with care and use light pressure to achieve a
blending of “color” with those areas that are not discolored.
External surfaces most subject to rusting from handling, or from exposure to the
elements should be cleaned and wiped dry after use or after exposure to adverse
conditions. If the rifle is to be stored, coat it with a light film of oil or
preservative. Where the rifle is in continuing use, and the presence of oil or
grease would be objectionable, then the external surfaces can be coated (after
cleaning and drying) with a paste wax formulated for use on metals. Apply the
wax sparingly, allow time for it to dry hard, then buff lightly with a soft cloth.
When applying the wax, take care that it does not get into the mechanism or on
the functioning parts or in the bore.
ATTACHING RUGER SCOPE RINGS
Each Ruger scope ring is a mated assembly of a top and a base. Do not mix the
parts of the two ring assemblies as they are not interchangeable. On the
underside of each mounting ring assembly there is an integral lug, located off
center with respect to the front and back sides of the mount. The lug is nearer to
the front surface. By reference to the lug, the mounting ring can be correctly
assembled with the front of the ring toward the muzzle of the rifle.
1. Disassemble one ring and reassemble over the scope body between the turret
and the eyepiece. Remember - the lug on the base should be on the front side
of the scope.
2. Install the four top screws. Do not tighten.
3. Disassemble the other ring and install it on the forward section of the scope
tube with the lug forwardly also. Install the four top screws. Again, do not
tighten.
4. Assemble the rings to the receiver with the lugs engaging the recesses in the
top surface of the receiver. Tighten the clamp nuts so that the rings are locked
to the semicircular cuts on the sides of the receiver.
5. Rotate the scope until cross-hairs are aligned properly and slide scope to
desired eye relief. Then tighten the eight top screws each a bit at a time to grip
the scope body.
6. Sight in according to the directions with your scope.