MIL-S-48573 1977 Edition, April 15, 1977
Includes all amendments and changes through Validation Notice 2, October 8, 2013
Additional Comments: INACTIVE FOR NEW DESIGN
This specification covers one type of instrument known as Sight-unit: XM64E2 used with the Lightweight Company Mortar, 60MM XM224 (See 6.1). Throughout this specification this instrument is referenced as "sightunit." This sightunit is composed of Telescope, Elbow: 11733780 and Mount, Telescope: 11741796. This sightunit has radioactively illuminated scales, level vials and reticle.