On their official blog, Sentinel has provided some detailed information and a whole bunch of pictures of the full scale, 1/1 bionic arm that comes with the Japanese Premium Package for Metal Gear Solid V: The Phantom Pain.
As mentioned before, the bionic arm is 50 centimeters long when the fingers are extended, and has a total weight of 850 gram including the pedestal.
The arm is made to look damaged and dirty, this was realized under supervision by Shinkawa.
It uses hex screws, just like the arm in the game. It has the same letters and numbers on it as well.
All fingers and the wrist have joined so you can make numerous poses.
The hand can also hold various objects due to the high retention force of its fingers.
The Premium Package is sold exclusively at Konami Style Japan, for a price of ¥29,800 (excluding tax).