RRP: £924

Free UK delivery on all orders over £50
  • With the MBS on maximum position :
    The injection of the airstream is unrestricted and the flow is maximized.
  • Perfectly positioned HP and MP ports provide optimal hose routing.
  • New front cover opening channels allow water to flow sideways over the diaphragm.


Aqua Lung Leg3nd MBS Regulator
This is the new LEG3ND, a masterpiece of engineering. The LEG3ND regulator is for the passionate, the explorers, the ones for whom diving is more than a sport. Aqua Lung, the original pioneer of the scuba regulator, brings you the most capable, coveted and advanced line of regulators ever created. After all, the ocean is the ultimate proving ground – a place where respect is given and earned equally, where true Legends belong.

The first inhalation under water is the start of a new adventure. The revolutionary combination of Venturi effect and inhalation effort adjustment is natural and intuitive. Aqua Lung’s Master Breathing System allows divers to control both in one simple rotation. All depths, all conditions, all dives – MBS will adapt.

The Leg3nd first stage is fitted with an Auto Closure Device (ACD), a feature designed to automatically seal the first stage gas inlet when the regulator is no longer pressurised in order to prevent contamination of the filter and internal components. The first stage is also fitted with 4 low pressure and 2 high pressure ports for flexible hose routing and configuration.

The Leg3nd MBS second stage is identical to the standard second stage with the exception of the MBS control. This control provides convenient adjustment of both the inhalation effort required to open the valve and the venturi effect within the second stage housing, giving one touch switching between pre-dive and dive settings.
The second stage valve is pneumatically balanced for improved performance regardless of depth, automatically compensating for increased ambient pressure as you dive deeper. The front cover has been redesigned to offer better protection when diving in strong currents, the purge button size has been increased for easier operation and the mouthpiece is now much easier and quicker to replace thanks to a new tool-less mouthpiece clamp.

Aqua Lung Leg3nd Octopus
When performance is your highest priority, LEG3ND is the answer. The LEG3ND shares the same breathing characteristics with the LEG3ND ELITE and LEG3ND MBS. The familiar Venturi switch now features an updated and ergonomic design. Because your sensations and emotions are amplified in the underwater world, you can focus on what matters: feeling free.


First Stage

When the first stage is not connected to a cylinder valve, the Auto Closure Device (ACD) keeps the inlet shut to protect the first stage internal parts from contamination and corrosive water.
Preserves the internal lubrication
Keeps the inlet filter clean and dry
Safer for elevated percentages of oxygen
Exceptional cold-water performance is achieved by modernizing Aqua Lung’s three anti-freeze properties:
Where there’s no moisture, there’s no ice: The LEG3ND’s integrated dry chamber keeps inner components clean and dry by isolating them from the outside environment
Deep ribs create a large heat exchange surface area that helps to prevent ice forming on the mechanism (+30% vs Glacia / +70% vs Legend 2)
The new overmolded cap delays ice forming over the external diaphragm
Auto-Balanced (also known as Over-Balanced)
Progressive increase of the working pressure to maintain optimum breathing efforts: Depending on the diver’s depth, the working pressure of the first stage is automatically elevated to counteract the increased breathing air density
Ergonomically shaped DIN and YOKE screws made of a bi-material “Soft Grip” surface provide a better hold when installing or removing the first stage – especially with cold hands
Channeled YOKE screw to prevent water retention.
Specialized ACD Dust cap attached to the regulator body to protect the inlet fitting and the ACD system from impacts or damage
Perfectly positioned HP and MP ports provide optimal hose routing

Second Stage

New front cover opening channels allow water to flow sideways over the diaphragm
Radial openings to prevent freeflows when diving in stronger currents
Openings widened to reduce peak inspiratory flow by an impressive 20%
New overmolded exhaust cover made of elastomer with a “soft touch” effect
Overmolded air purge
Wide surface area makes regulator purging easier
Purge depth controller optimizes air flow with minimal effort
Patented Comfobite mouthpiece reduces jaw fatigue and secures the second stage more comfortably.
Detachable and reusable mouthpiece clamp allows a quick and simple tool-free mouthpiece change without plastic waste.
The enlarged heat exchanger helps to prevent freezing of the second stage mechanism
Air channel deflector
Directs the air flow evenly during the inhalation phase
Streamlined bi-material deflector lowers the exhalation effort
Flexible and lightweight Aqua Flex hose with dual protectors


Models Yoke, DIN, Supreme Yoke, Supreme DIN
Type of first stage Over-balanced diaphragm design, environmentally sealed
First stage weight yoke / din (grams) 882 / 668
First stage length (mm) 74.7
Auto-Closure Device (ACD) YES
First stage MP chamber Enlarged, symmetrical, all ports provide equal access
Number of HP ports 2
Number of MP ports 4
Environmental Dry Kit Standard
First stage exterior Chrome over marine brass
First stage handwheel Triangular shape with oversized soft grip ribs, auto-drain
First stage dust cap Redesigned so it will not inadvertently open the auto-closure device (ACD)
Type of second stage Pneumatically balanced
Second stage weight – (grams) 210
Second stage diameter (cm) 6.57
Controls Venturi switch
Breathing resistance Preset
Mouthpieces 2 – Comfo-Bite™ installed, standard with bite wings in box
Front cover Co-molded w/ limited range to control purge flow rate
Exhaust tee redesigned for better bubble dispersion and easier exhalation
Lip shield Supreme model only
Heat Exchanger for freezing resistance YES
Hose type 29″ braided AquaFlex hose
Hydrodynamic openings Lateral
Overall work of breathing (WOB) scores Avg. 0.74 joules/liter
Nitrox compatible Yes to 40% O2 when new, out of the box



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

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