The lightweight rucksack with aluminum frame was developed by Natick Laboratories for cold weather and mountain use as an initial effort to develop lightweight load-carrylng equipment in 1961. It weighed 3 pounds (1.4 kg) as compared to the 7.5 pound (3.4 kg) cotton rucksack with steel frame which it replaced.
The aluminum frame gave the load stability on the wearer's back, and the nylon pack, with a capacity of 1.15 cubic feet was almost twice as large as the M-56 pack (.67 cu ft). Furthermore, a small demountable platform was provided which could be attached at the bottom of the frame; this shelf made it possible to carry items like a five-gallon water can, and thus served as a lightweight packboard.
- frame and cargo support shelf: MIL-F-43356
- snow camouflage cover: MIL-C-41823
- rifle butt pocket and strap assembly: MIL-R-43323
- complete set: RUCKSACK, LIGHTWEIGHT
- pack: FIELD PACK
- frame: FRAME, FIELD PACK
- waist strap: STRAP, WEBBING
- standardized model, complete set: 8465-782-3248
- pack: 8465-782-2113
- riveted frame: 8465-782-3249
- waist strap: 8465-782-3250
- shelf: 8465-782-6722
- snow camouflage cover: 8465-270-0414
- rifle butt pocket and strap assembly: 8465-782-2779
- earlier models
- T-62-2: 8465-889-3773
- 1964: 8465-965-4416
- Metzger, Eldon C. (July 1975). History of the Development of the LINCLOE Loadcarrying Equipment. Natick, MA: United States Army Natick Development Center. [pdf]
- Kennedy, Stepehen; Goldman, Ralph; Slauta, John. (May 1973). The Carrying of Loads within an Infantry Company. Natick,MA: Clothing and Personal Life Support Equipment Laboratory, US Army Natick Laboratories. [pdf]
- Rottman, Gordon L. (January 26, 2017). Vietnam War US & Allied Combat Equipments. Oxford, UK: Osprey Publishing.
- Monroe, C. A., Pickrall, Craig. (2012). American Web Equipment 1967-1991. Marlborough, Wiltshire, UK: The Crowood Press.