The ornamental design for a sightaimingdevice, as shown and described.
FIG. 1 is a perspective view of a sight aiming device showing our new design.
FIG. 2 is a rear view of the sight aiming device.
FIG. 3 is a front view of the sight aiming device.
FIG. 4 is a left view of the sight aiming device.
FIG. 5 is a right view of the sight aiming device.
FIG. 6 is a top view of the sight aiming device.
FIG. 7 is a bottom view of the sight aiming device; and,
FIG. 8 is a perspective view of the sight aiming device, showing of the sight aiming device attached to the firearm hanguard, wherein the broken line portion of the figure drawing is included to show unclaimed subject matter only and forms no part of the claimed design.