Packaging
Aside from the mouse, one finds a charging dock, wireless dongle, USB Type-A to Type-C cable, and quick start guide in the box.
Weight
My scale shows around 86 g (+/- 1 g), which is slightly more than the weight cited by MSI. Compared to the Razer DeathAdder V3 Pro, the GM51 Wireless weighs substantially more, though it does feature RGB lighting, unlike the DeathAdder V3 Pro. A decent weight.
Cable
The Clutch GM51 Lightweight Wireless comes with a paracord-like, braided charging cable (USB Type-C to Type-A). In terms of flexibility, this one is is considerably stiffer than that of the Clutch GM41 Lightweight Wireless, and thus may be perceived as restrictive when playing while charging. Its measured length is 1.95 m.
The charging cable also functions as an extension cable when used with the docking station, which doubles as a wireless extender. The docking station can be used to keep the distance between dongle and mouse as short as possible. While the mouse doesn't include a storage compartment for the dongle per se, it can be stored within the space in front of the USB connector.
Feet
The feet on the Clutch GM51 Lightweight Wireless are white-dyed pure PTFE (Teflon) feet with slightly rounded edges. Glide is very good and thickness average. The ring around the sensor ensures CPI stays consistent upon applying vertical pressure.