1. Remove the two barrel screws (Key Nos. 4 & 5) as shown in Figure 5a. (Do not remove the two remaining screws.)
2. Attach the sight base (Key No. 7) using the two screws removed in step 1, and the two screws (Key Nos. 7a & 7b) provided with the base as shown in Figure 5b. Be careful to locate the screws in the correct holes as shown in Figure 5b. Apply a removable liquid threadlocker per the manufacturer's instructions.
The Ruger M77 Mark II Frontier Rifle is a compact rifle with a shorter stock, chambered for powerful magnum cartridges that generate heavy recoil. If you are going to mount a scope on your Frontier Rifle, always use the front scope mounting barrel rib to avoid injury from the scope during recoil.
If you are using a scope, you must use a scope designed with "intermediate eye relief" of from 7 to 15 inches. Consult your scope manufacturer for this information.
DO NOT MOUNT SCOPE ON RECEIVER OF M77 MKII FRONTIER RIFLES
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