The ornamental design for a singlepoint sling, as shown and described.
FIG. 1 is perspective front view of the single point stick in a first configuration in an environment of use;
FIG. 2 is a perspective front view of the single point stick in a second configuration in an environment of use;
FIG. 3 is a perspective rear view of the single point stick;
FIG. 4 is a close-up cut away view of a connector portion and an object retention portion of the single point stick, showing the magnet disposed in the object retention section; and,
FIG. 5 depicts the single point stick in an environment of use.
The broken lines in the drawings illustrate environmental subject matter only and form no part of the claimed design. The single point stick comprises a strap portion, a connector portion, and an object retention portion.