WINDOW ASSEMBLY is attached to the front of the objective tube (1) and fastened in place with two
setscrews. The window seals the telescope against moisture, dirt and foreign matter.
RETICLE ILLUMINATION ADAPTER allows light to enter the telescope when the reticle needs to be
ARTICULATED JOINT ASSEMBLY lets the objective end of the telescope move without moving the
eyepiece. This keeps the eyepiece conveniently available to the gunner throughout the range of the main
gun elevation and depression. A prism system prevents image tilt.
SELECTOR LEVER selects the reticle pattern according to the type of ammunition being used.