Packaging
Aside from the mouse, one finds a charging cable, wireless dongle, quick start guide, and a sticker in the box.
Weight
My scale shows around 129 g (+/- 1 g). Though no doubt a heavy mouse, the M913 Impact Elite isn't entirely out of line with other MMO mice. The Corsair Scimitar RGB Elite weighs in at 118 g despite being wired-only, and the Logitech G604 even goes as high as 137 g with the default AA-battery installed.
Cable
The M913 Impact Elite comes with a braided charging cable (USB Type-A to Type-C). As far as flexibility goes, it can only be described as supremely stiff. There is no anchor on the mouse-end of the cable, so the cable may come loose inadvertently during use. Its measured length is 1.80 m. The cable has a ferrite bead attached, which reduces signal noise.
Feet
The feet on the M913 Impact Elite are regular black-dyed PTFE (Teflon) feet. Glide is decent.