Bushnell 53-0021 Instruction Manual page 5

To mount the sight to a Weaver-style rail, follow these steps, refer to Figure 3:
1. Loosen the 7/64" hex retainer screw that secures the clamp.
2. Place the sight onto the rail such that the unthreaded portion of the cross bolt is fitted into a groove on
the top of the Weaver-style rail. The user's preference and the firearm will determine the optimal front
to back position on the rail.
3. With the cross bolt inserted fully into the rail's groove, push the sight as far forward as possible.
4. Tighten the hex retainer screw to draw the retainer nut into secure and fully seated contact with the
opposite side of the rail.
FIGURE 3
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NOTE: Loosen the retaining screw just enough to mount or remove the sight. It is not necessary to remove
the screw completely, as the lock hardware will not be retained in the sight and could be lost.
To mount the sight to a 12 gauge Remington model 870, 1100 or 1187 shotgun, follow these steps, refer
to Figure 4:
1. Remove the two through-pins from the shotgun.
2. Remove the two 1/8" hex retainer screws from the sight.
3. Place the sight onto the shotgun.
4. Re-install the two hex head screws through the sight and shotgun.
5. Tighten the two hex retainer screws to secure the sight to the shotgun.
FIGURE 4
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