The ornamental design for a scope mount for a rifle or similar firearm, as shown.
FIG. 1 is a right rear perspective view of a scope mount for a rifle or
similar firearm showing my new design, with the riflescope shown in broken
lines presented for illustrative purposes only;
FIG. 2 is a left rear perspective view thereof;
FIG. 3 is a side elevational view;
FIG. 4 is an elevational view of the opposite side; and
FIG. 5 is a top plan view thereof with the broken-line riflescope removed.