The armrests are located at the right inner side of the cockpit and are used to help the pilot to relax in order to increase the resistance during high G's flights. The pilot can rest his forearm on this armrest.

Pictures from the Armrest

Armrest

Note:
To zoom please select the picture with your mouse.

Source:
Picture No. 4, 5 and 6 was provided by Erwin Neyt.