The ornamental design for a frontfoldingsight for a firearm, as shown and described.
FIG. 1 is a top, right, rear perspective view of a front folding sight for a firearm attached to a firearm showing our new design;
FIG. 2 is a top, right, front perspective view of the front folding sight for a firearm of FIG. 1;
FIG. 3 is a front elevation view of the front folding sight for a firearm of FIG. 1;
FIG. 4 rear elevation view of the front folding sight for a firearm of FIG. 1;
FIG. 5 is a right side elevation view of the front folding sight for a firearm of FIG. 1;
FIG. 6 is a left side elevation view of the front folding sight for a firearm of FIG. 1;
FIG. 7 is a top plan view of the front folding sight for a firearm of FIG. 1;
FIG. 8 is a bottom plan view of the front folding sight for a firearm of FIG. 1; and,
FIG. 9 is a top, left, front perspective view of the front folding sight for a firearm of FIG. 1 showing the front folding sight pivoted to an upright operative position.
The broken lines showing portions of the design in all figures are included for the purpose of illustrating environment and unclaimed features and forms not part of the claimed design.