GI 5 Piece Improved ACU Modular Sleep System (IMSS) — ACU, Used

Tennier Industries

  • $199.99
Shipping calculated at checkout.



The US Military Improved ACU Modular Sleep System (MSS) is a sleeping bag system constructed to insulate the user in environments ranging from mild weather to extremely cold weather. The system consists of two Mummy-style sleeping bags-the Patrol (Foliage) and the Intermediate Cold Weather (Urban Grey). Each is constructed of water-resistant, ripstop nylon. Each sleeping bag is fully functional independently. For a temperature of -30°, insert the Intermediate Cold Weather bag inside the Patrol bag. Each bag is compatible with the vapor-permeable Bivy cover. When all 3 components are used together the system is rated to provide 4 hours sleep at -40°F. Non-flammable and machine washable. Made in the USA by Tennier Industries.

This item includes components that were lightly used by US troops in the field. 


Temperature to +30°

Water-resistant, ripstop nylon

Reversible double-pull (opens end to end) slider allows top or bottom ventilation

Non-locking slide fastener self-repairs if jammed or snagged

Draft flap prevents heat loss

Hood adjusts for heat retention; includes nylon drawcord and barrel lock

DIMENSIONS: 92 x 37' to 92 x 24"

COLOR: Foliage

Weight: 2 lb 7 oz



Temperature to -10°

Water-resistant, ripstop nylon

Free from cold spots

Insulation does not migrate in the bag

Anatomically designed foot box contains twice the insulation as the bag

Sewn-in, quilted chest collar prevents air drafts up and down through the hood

Hood adjusts for heat retention; includes nylon draw cord and barrel lock

DIMENSIONS: 87 x 35 1/2" to 87 x 23"

COLOR: Urban Grey

Weight: 3 lb 10 oz



Made of durably waterproof and windproof 3-layer laminate fabric and approved by all departments and agencies of the Department of Defense

Includes snap fastener and slide fastener

DIMENSIONS: 85" x 28" x 35"


Weight: 1lb 14oz



Compressible to one cubic foot

Six 1"-wide nylon webbing straps adjust by ladder lock buckles

Reinforcement webbing is sewn around the circumference of the bag

Nylon drawcord closure with a barrel lock

DIMENSIONS 30" in length, 14" in diameter

COLOR: Foliage

Weight: 12 oz




Weight: 8oz



NSN: 8465-01-547-2757


All components are manufactured by Tennier Industries


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Customer Reviews

Based on 28 reviews
Michael K. (Phoenix, Arizona, United States)
I have missed my service sleeping system. This was an incredible purchase

Just to get it out of the way, since this is a used sleeping system with wear, the wear I found was minimal. One of the snap buttons on the intermediate bag was gone which wasn't a big deal to me. In the goretex cover there was a strip of fabric hanging that was fixed with glue. Other than other surface wear with the fabrics, it's in amazing shape.

One of my favorite pieces of gear I was issued was my sleeping system. I was really sad to part with it, I was even thinking of writing it off as lost and paying for the loss just to keep it. When I got into recreational camping and needed to shop around, nothing could take the place of this amazing piece of equipment. Even just getting into another bag felt wrong to me.

So I shopped around to find the ACU sleeping system and came across McGuire. After reading reviews saying their surplus bags were in great condition I decided to take the chance. I very satisfied with my purchase. Thank you for helping me fill the void, it will be my choice for backpacking as well.

A.B. (Logan, Utah, United States)
A bit dirty, but good

I don't know what I expected, but this is great quality though the heavier sleeping bag was kinda gross looking. I washed it and it looks fantastic now! Great price for what I got.

tony h.e. (Boyd, Texas, United States)
Very happy with my purchase.

The product purchased was exactly as advertised and of very good quality. Shipping rates were reasonable and delivery time was phenomenal. Thank you very much Mcguire Army Navy.
Respectfully, satisfied customer Tony E.

Brady E.
Military sleep system

All items were as described. All items were clean and in good to very good shape. I have ordered several items and will continue to in the future.

Ethan H. (Sacramento, California, United States)
Amazing quality

Way better than I was expecting, was amazed by the quality of the MSS that I vought, even though it was in used condition it was practically brand new

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