The ornamental design for a connectionring for a firearm sling, as shown and described.
FIG. 1 is a top, left, front perspective view of a connection ring for a firearm sling showing our new design;
FIG. 2 is a top plan view of the connection ring for a firearm sling of FIG. 1, the bottom plan view being a mirror image thereof;
FIG. 3 is a front elevation view of the connection ring for a firearm sling of FIG. 1;
FIG. 4 is a rear elevation view of the connection ring for a firearm sling of FIG. 1;
FIG. 5 is a left side elevation view of the connection ring for a firearm sling of FIG. 1, the right side elevation view being a mirror image thereof;
FIG. 6 is a bottom, left, rear view of the connection ring for a firearm sling of FIG. 1; and,
FIG. 7 is a top plan view of the connection ring for a firearm sling of FIG. 1 with a sling and a quick release loop attached thereto.
The broken lines showing portions of the design in all figures is included for the purpose of illustrating environment and unclaimed features and forms not part of the claimed design.