The ornamental design for a riflescabbard, as shown and described.
FIG. 1 is a front perspective view of a rifle scabbard;
FIG. 2 is a front elevation view of the rifle scabbard of FIG. 1;
FIG. 3 is a rear elevation view of the rifle scabbard of FIG. 1;
FIG. 4 is a right side elevation view of the rifle scabbard of FIG. 1;
FIG. 5 is a left side elevation view of the rifle scabbard of FIG. 1;
FIG. 6 is a top plan view of the rifle scabbard of FIG. 1; and,
FIG. 7 is a bottom plan view of the rifle scabbard.
The broken lines showing stitching, a portion of the gun, hooks and straps are for the purposes of illustrating environment and form no part of the claimed design.