The ornamental design for a firearmquickdetach mount for a sling, as shown and described.
FIG. 1 is a front, left perspective view of a firearm quick detach mount for a sling of the present invention shown on a firearm;
FIG. 2 is a front, top, left perspective view of the firearm quick detach mount for a sling of FIG. 1;
FIG. 3 is a front elevation view of the firearm quick detach mount for a sling of FIG. 1;
FIG. 4 is a rear elevation view of the firearm quick detach mount for a sling of FIG. 1;
FIG. 5 is top plan view of the firearm quick detach mount for a sling of FIG. 1, the bottom plan view being a mirror image thereof; and,
FIG. 6 is a right side elevation view of the firearm quick detach mount for a sling of FIG. 1, the left side being a mirror image thereof.
The broken lines showing portions of the design in all figures are included for the purpose of illustrating environment and unclaimed features and form no part of the claimed design.