Description
Technical Manual (TM 9-1240-217-34) for M18 Reflex Sight, XM75 Optical Sight, and Sight Mount July 1972
This Technical Manual TM 9-1240-217-34 covers the M18 Reflex Sight, XM75 Optical Sight, and Sight Mount and is dated July 1972.
The publication is a direct support and general support maintenance manual that also includes depot repair parts and a special tools list for these U.S. Army fire-control components.
Historical Significance
The M18 Reflex Sight was an antiaircraft tracking sight developed for use with caliber .50 machine guns and 40 mm antiaircraft weapons. It helped the gunner follow a moving aircraft while keeping the projected reticle and target in the same focal plane.
The XM75 was a related reflex-type optical sight intended for a missile-launching fire unit installed on a tracked cross-country vehicle. By grouping both sights with their mounting hardware, this 1972 manual documents two specialized applications of Army reflex-sight technology.
What This Manual Covers
TM 9-1240-217-34 provides maintenance guidance for the M18 and XM75 sights at the direct support and general support levels. Its title also identifies depot repair parts and special tools needed to support authorized repair work.
The manual covers the M18 sight under Federal Stock Number 1240-759-7799, the XM75 sight under Federal Stock Number 1240-080-7483, and the associated sight mount under Federal Stock Number 1290-767-5757. The mount identified by that stock number is used with the M18 Reflex Sight and connects the optical instrument to the weapon-mount assembly.
Key Features
- Official publication number: TM 9-1240-217-34
- Publication date: July 1972
- Equipment covered: M18 Reflex Sight, XM75 Optical Sight, and Sight Mount
- Maintenance scope: direct support and general support maintenance
- Included reference material: depot repair parts and special tools list
- M18 Reflex Sight Federal Stock Number: 1240-759-7799
- XM75 Optical Sight Federal Stock Number: 1240-080-7483
- Sight Mount Federal Stock Number: 1290-767-5757
Why This Manual Matters
This publication preserves the Army's higher-level maintenance structure for two reflex-sight models and their related mount. It is useful for identifying the correct sight, stock number, repair category, and support hardware within period fire-control systems.
It also connects the M18 to antiaircraft gun tracking and the XM75 to a tracked missile-launching fire unit, making the manual relevant to research on both gun-based and missile-based Army fire-control equipment.
About This Manual
Published by Headquarters, Department of the Army in July 1972, TM 9-1240-217-34 is a direct support and general support maintenance manual with depot repair-parts and special-tool coverage for the M18 Reflex Sight, XM75 Optical Sight, and sight mount.
Ideal For
This manual is a strong fit for:
- U.S. Army technical-manual collectors
- Military optics and fire-control researchers
- Antiaircraft weapon-system historians
- Tracked missile-launcher research projects
- Military museums and reference libraries
Approx length 8", Approx width 11", Approx height .25", Approx weight .5lbs.
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