A ratchet trades the twist-and-lock of a windlass for a lift you can do with gloves on — and every click it gives you, it keeps.
At a glance
12 things to know about the RMT Tactical
What the ratchet does differently, what the volunteer studies measured, and where it falls short.
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01
It is the RMT the evidence-based names
The evidence-based's list of recommended limb tourniquets names the "Ratcheting Medical Tourniquet (RMT) Tactical" by name.2 m2® builds this 1.5 in. Tactical as its Military/Law model and marks it with the May 2019 evidence-based listing on its own model sheet.3,4 The recommendation attaches to the Tactical: m2®'s 2 in. Wide, Paramedic and civilian RMTs are separate models the list does not name.2,4
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02
A ratchet, not a windlass
There is no rod to twist and lock. Lifting the buckle's arm advances it one tooth along a ladder strap, and the buckle locks on that tooth by itself. m2® describes the system as self-locking, applied with gross motor skills and confirmed by an audible ratcheting sound.3,5
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03
Tightening comes in small, fixed steps
The Tactical's ladder carries 2.5 teeth per centimeter. In volunteers, one more tooth past the point where the pulse disappeared added a median 40 mmHg on the thigh and 49 mmHg on the arm9 — fine enough to snug the tourniquet again after the limb relaxes or the casualty is moved.
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04
The narrow ladder was built on purpose
In 16 volunteers, the Tactical RMT's 1.9 cm ladder skipped a tooth in 1 of 64 applications; m2®'s Mass Casualty RMT, with a 2.3 cm ladder, skipped in 27 of 64. Effectiveness, ease of use and discomfort did not differ, and the authors judged the narrower system the better performer.8
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05
It held occlusion well in volunteers
In the same series the two RMTs reached occlusion in 99% of applications and lost it in 1% over one minute; a separate C-A-T series reached 95% and lost occlusion in 28%. That was a retrospective comparison, not a head-to-head trial, and pressures under both devices often ran above 300 mmHg.8
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06
Pressure fades — reassess every tourniquet
In a second series, all 96 RMT applications on 16 volunteers reached occlusion, at a median 256 mmHg on the thigh and 230 mmHg on the arm for a single Tactical. Pressure then fell under every tourniquet within two minutes, and two single-Tactical thigh applications lost occlusion.9 Check it again after it is on.
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07
Self-securing removes a failure point — but routing still matters
Sixty-four appliers each put eight tourniquets on live thighs. Windlass rods produced 111 mechanical problems — losing hold of the rod, redoing turns, struggling to secure it — against 19 for the ratchet systems, the Tac RMT among them. The Tac RMT's own weak spot was strap routing: four applications ended with a pulse still audible because the applier misunderstood how the strap ran.10
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08
What untrained hands did with it
In a trial of 176 untrained adults given only the packaging instructions, those assigned the RMT applied it effectively 64.4% of the time — the best of four tourniquets — and fastest, in about 101 seconds.12 In a second study of 198 untrained adults, success was 23.4% with the RMT, 16.9% with the C-A-T and 10.6% with the SWAT-T, a difference that was not statistically significant; every device failed far too often.13 No tourniquet replaces training.
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09
Military testing behind the 2019 listing
The evidence-based's 2019 review summarized Navy testing of the m2®-design ratchet tourniquets: 94.55% success over 110 self-applications by 55 service members, about 44 seconds on the arm and 47 on the leg. Of the six failures, two were user error, one exceeded 300 mmHg and three stopped for discomfort.7 The Committee voted the RMT Tactical onto the list in April 2019.7
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10
Heat alone did not degrade it; long weather exposure degraded everything
After 91 days in an oven at 130 °F (54.4 °C), heat was not associated with damage or with failure to control bleeding on a manikin for the RMT, the C-A-T or the SOF-T.15 Eighteen months on a metal roof in San Antonio cut effectiveness across all three models, 89% against 99%;14 for the RMT, 48 of 50 tests against 50 of 50.7 Stage it covered.
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11
The instructions are on the strap — and so is the release
"1. PULL TIGHT" and "2. LIFT" are printed on the webbing. To release it, put a finger under the tab labeled "LIFT TO OPEN" and lift strongly.3,5 m2® moved the release inside the lever arm in 2010 to rule out an accidental release.4
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12
In service since 2002
m2® first commercialized the RMT in June 2002, sold as the "Burke"; about 10,000 Burke RMTs went to the 10th Mountain Division in 2005. The Tactical version arrived with the 23rd generation in May 2011.4 m2® registers and lists the RMT with the FDA as a Class I nonpneumatic tourniquet, exempt from 510(k).6
How to apply the RMT Tactical
Placement first, then m2®'s pull-and-lift sequence, in order.
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1Pick the placement. Under fire, or when you cannot see where the blood is coming from: hasty — high and tight on the limb, as close to the body as you can get it, over the clothing. When time and safety allow and you can see the source: deliberate — on bare skin, 2–3 in. above the wound, moving above the joint if that spot lands on one. Never across or directly over a joint.1
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2Get it around the limb. Place the tourniquet around the injured arm or leg.5
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3Pull tight. Grab the loop and pull the webbing tight to take out the slack before you start ratcheting.5
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4Lift to tighten. Lift the buckle's ratcheting arm, again and again, until the bleeding stops and the pulse below the tourniquet is gone.1,5 It hurts. That is expected.
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5Still bleeding? Add a second. If one tourniquet does not stop it, apply a second tourniquet side-by-side with the first.1
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6Mark the time. Write the time of application on the tourniquet and on the casualty card with a permanent marker.1
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7Reassess, then decide on conversion. Recheck the bleeding and the pulse once the scene allows, and convert a hasty tourniquet to a deliberate one: a second tourniquet on skin 2–3 in. above the wound, tightened, then the first loosened. If the source still cannot be found, it stays high and tight.1
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8Release only when removal is the plan. Put a finger under the "LIFT TO OPEN" tab and lift strongly.5
Where it fits
- Life-threatening bleeding from an arm or a leg that a tourniquet can reach1
- Any traumatic amputation, even one that is barely bleeding — adrenaline clamps the arteries down, and when it wears off they open and the bleeding starts
- A second tourniquet side-by-side when one is not enough1
- Gloved, cold or shaking hands — a lift of the arm instead of fine rod work3
- The groin, armpit or neck — those wounds are packed with hemostatic gauze or controlled with a junctional device
- Across or directly over a joint, in either placement
- Bleeding that direct pressure or a pressure dressing controls
- Children 2 and under — direct pressure or a pressure wrap is the better tool
The evidence
Every study cited above, what it tested, and how strong the evidence is.
| Study | Evidence type | What was studied | What it found |
|---|---|---|---|
| Wall et al., J Spec Oper Med 2014 | Human volunteer | Tactical RMT vs Mass Casualty RMT, 16 recipients, thighs and arms; retrospective comparison with the C-A-T | Tooth skips 1/64 Tactical vs 27/64 Mass Casualty; RMTs 99% occlusion, 1% lost in 1 min vs C-A-T 95%, 28% lost |
| Wall et al., J Spec Oper Med 2016 | Human volunteer | Single Tactical RMT, Wide RMT and paired Tacticals, 16 recipients, 96 applications | All occluded; Tactical median 256 mmHg thigh, 230 mmHg arm; pressure fell under all within 120 s; 2 single-Tactical thigh losses |
| Wall et al., J Spec Oper Med 2023 | Human volunteer · 8 devices | 64 appliers, 512 applications of 8 tourniquets including the Tac RMT on live thighs | Ratchets 19 mechanical problems vs 111 for windlass rods; 4 Tac RMT strap-routing errors left a pulse |
| Wall et al., J Spec Oper Med 2020 | Human volunteer · models | C-A-T 7, SOFTT-W, Tac RMT and SWAT-T over bare skin and clothing | Clothing did not significantly change secured pressures on thighs; 11 of 15 appliers found securing over clothing hardest |
| Montgomery et al., J Spec Oper Med 2019 | Expert review · evidence-based | evidence-based limb tourniquet review; m2®-design ratchets (RMT Tactical, TX2, TX3) scored as one group | Navy self-application 94.55% success (110 applications, 55 service members); RMT Tactical added April 2019 |
| Portela et al., Acad Emerg Med 2020 | Simulation · laypeople | 176 untrained adults, packaging instructions only, simulated bleeding arm; SOFTT-W, C-A-T, RMT, SWAT-T | RMT highest effective rate (64.4%) and fastest (100.9 s) |
| Ross et al., J Emerg Med 2018 | Simulation · laypeople | 198 untrained adults randomized to C-A-T, RMT or SWAT-T | Success 16.9%, 23.4%, 10.6% (p = 0.149); failure rates unacceptably high for all |
| O'Conor et al., J Spec Oper Med 2017 | Manikin · environmental | SOFTT-W, RMT and C-A-T after 18 months on a metal roof vs laboratory controls, 300 assessments | Exposed devices less effective (89% vs 99%) and more often damaged (3% vs 0%) |
| Davinson et al., J Spec Oper Med 2015 | Manikin · heat | C-A-T, SOF-T and RMT after 91 days at 130 °F vs unheated controls | Heat not associated with damage, loss of hemorrhage control or failure to stop the pulse |
Strongest to weakest: human-volunteer studies, then simulation and manikin studies, then expert review. The two lay studies disagree on how much the RMT helps untrained hands; both agree that untrained users fail too often with every device.
How it compares
The ratchet tourniquets a buyer weighs against the RMT Tactical, and the windlass benchmark.
| RMT Tactical | RMT Wide 2 in. | TX3 | C-A-T® Gen 7 | |
|---|---|---|---|---|
| Maker | m2® Inc. | m2® Inc. | RevMedx | North American Rescue |
| Tightening system | Ratchet — 0.75 in. buckle on a ladder strap | Ratchet — 1 in. buckle on a ladder strap | Ratchet on a polymer ladder | Windlass rod, secured after tightening |
| Band width | 1.5 in. | 2 in. | 3 in. | 1.5 in. |
| Weight | 3.6 oz | 5 oz | 0.5 lb packaged | 2.7 oz |
| Self-securing | Yes — each click holds | Yes — each click holds | Yes — each click holds | No — rod and strap are secured as separate steps |
| evidence-based standard | Yes — RMT Tactical | No | Yes — TX3 | Yes — C-A-T Gen 7 |
| NSN on the evidence-based list | 6515-01-527-3841 | — | 6515-01-667-6208 | 6515-01-521-7976 |
RMT weights are m2®'s device figures; the TX3 weight is RevMedx's packaged figure; the C-A-T weight is from the evidence-based's 2019 review.3,7 The RMT Wide is not on the evidence-based list; absence from the list does not by itself mean a device was tested and failed.
Build the system
The other ratchet tourniquets, the windlass alternatives, a trainer, and what goes in the kit beside it.
Questions buyers ask
Package & specifications
Available Options:
- Black
- Tan
Specifications coming soon. Contact us for detailed product information.
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