RRP: £369

Free UK delivery on all orders over £50
  • The Apex MTX-R Octopus has been optimised to perform flawlessly in any condition meaning it doesn’t require a venturi switch.
  • Double swivel hose for greater freedom of movement and comfort.
  • Patented heat exchanger surrounds the valve mechanism, dissipating the cold.

In stock


While many dive Octo’s are feature-lite shadows of the real deal, Apeks know that if you ever need your Octopus in the extreme technical environments their MTX-R regulators are designed to handle your gear can’t be compromised.

The MTX-R Octopus features the same unparalleled specifications as the MTX-R 2nd stage allowing it to function flawlessly in brutally cold, or deep water.

It’s pneumatically balanced design allows you to enjoy consistent and effortless breathing even when your air reserves are at minimum. Based on the Military Apex MTX regulator, the MTX-R Octopus has been tested to NEDU (Navy Experimental Dive Unit) Standards. It can handle near zero degree temperatures down to 60m, easily.

With bright yellow highlights on the tough, reinforced body, it’s easily visible. The long braided hose is also clear yellow, so you can always see it, even in murky water.

As with all Apex Octo’s the MTX-R Octopus features a comfo-bite mouthpiece. These mouthpieces feature a bridge that sits across your plate. This prevents the dry, cool air from your regulator drying out your palate while also providing support for you Octopus reducing jaw fatigue.


Simple to use 2nd stage with no dive adjustment controls and a reduced chance of free flow.
Double swivel hose for greater freedom of movement and comfort.
Patented heat exchanger surrounds the valve mechanism, dissipating the cold caused by gas expansion while drawing in the warmth of the ambient water.
Developed in accordance with the United States Navy Experimental Dive Unit extreme cold water test.
Tested for use to 60 metres in cold water.


Connections Yoke and DIN available
Type of first stage Over-balanced diaphragm design, environmentally sealed
Body Type One piece forged body
DIN 1st stage – 638g
Yoke 1st stage – 763g
2nd stage – 154g
Number of HP ports 1 (7/16″ UNF)
Number of MP ports 4 (3/8″ UNF)
Environmental Dry Kit Standard
First stage exterior Satin
Coldwater Use Yes
Type of second stage Pneumatically balanced
Opening Effort Control Knob No
Integrated Venturi Lever Yes
Mouthpiece Comfo-bite™
Exhaust tee Standard, one set
Heat Exchanger for freezing resistance Yes
Hose type Braided Flexi-hose
Overall work of breathing (WOB) scores Avg. 0.90 joules/liter
Nitrox compatible Yes to 40% O2 when new, out of the box / Can be O2 cleaned to 100%.


Scuba Dive Store always offer an extended returns policy of 30 days – so you can rest assured that if the suit, piece of diving equipment or gift doesn’t suit then just send it back and we will either exchange it or offer a full refund less any postage costs. Please return the item to the following address:

Scuba Dive Store
Valley Rd

Click here for full terms and conditions >


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