Product Overview:
Telescope, Straight: M90 Series
NSN: 1240-764-8432 M90C
NSN: 1240-759-7853 M90D
NSN: 1240-601-4065 M90F
P/N: 7648432 M90C
P/N: 7597853 M90D
P/N: 8205096 M90F

General Description
Telescope: M90C is used for direct fire with Rifle, 105 millimeter: M27A1. Telescope: M90D is used for direct fire with Rifle, 75 millimeter: M20 and T21E12. Telescope M90F is used with the Hawk Missile System. These telescopes are of the fixed-focus type, having an offset in the geometric and optical axis. They include objective cover, eyepiece, body assembly, eyeshield, and sunshade. The body houses a prism-type erecting system. The telescope has a stadia reticle. It also has an open sight on top of the body.

These three telescopes are identical, except for the reticles.