Aqualung Regulator Package: Leg3nd MBS + Gauges + BCD Hose

Aqualung's Leg3nd MBS takes an already high-performing regulator and refines the one thing experienced divers know matters most underwater — control. The Master Breathing System adds an all-in-one inhalation and venturi adjuster to the second stage, combining both settings into a single, intuitive control that optimises your breathing experience as you move it from minimum to maximum. Everything else that makes the Leg3nd one of the most capable regulators in its class remains exactly as it should be. Paired with your choice of Miflex gauge setup and a Miflex BCD hose, this package gives you a complete, precision breathing system ready to slot straight into your existing rig.

At the heart of the package is the Aqualung Leg3nd MBS Stage 3 Regulator Set. The first stage is built around an over-balanced diaphragm design that is fully environmentally sealed — isolating internal components from moisture and contamination, and automatically increasing working pressure as you descend to maintain optimum breathing effort at depth. Three dedicated anti-freeze systems work in combination: a dry chamber that keeps inner components isolated from the outside environment, deep heat-exchanging ribs that create a large heat exchange surface area to prevent ice formation on the mechanism, and a new over-moulded cap that delays icing over the external diaphragm. The Auto Closure Device (ACD) seals the first stage inlet automatically whenever the regulator is disconnected from a cylinder, keeping the filter clean, protecting internal lubrication and making the regulator safer for elevated oxygen percentages. Ergonomically shaped DIN and Yoke screws with bi-material Soft Grip surfaces make tank changes straightforward even with cold hands, and perfectly positioned HP and MP ports provide optimal hose routing throughout. The second stage carries the MBS control as its headline feature — a single adjuster that simultaneously manages inhalation effort and venturi effect, giving you one-touch switching between pre-dive and dive settings without fumbling for separate controls. The pneumatically balanced valve automatically compensates for increased ambient pressure as you go deeper, while a redesigned front cover with radial openings and widened channels reduces peak inspiratory flow by an impressive 20% and actively resists free-flows in strong currents. An enlarged heat exchanger helps prevent second stage freezing, and a streamlined bi-material air channel deflector lowers exhalation effort throughout the dive. The overmoulded purge button has a wide surface area for easy operation, a tool-less mouthpiece clamp makes mouthpiece changes quick and waste-free, and the patented Comfobite mouthpiece reduces jaw fatigue on longer dives. A flexible, lightweight Aqua Flex hose with dual protectors completes a second stage that feels as good as it performs.

Completing the breathing system is the Aqualung Leg3nd Octopus, paired to match the primary second stage and built to the same standard. A dependable, easy-to-operate backup air source for you and your buddy.

Connecting your regulator to your BCD is the Miflex Xtreme BCD Hose, fitted with a standard 3/8" quick-release coupler suitable for most BCDs, wings and drysuits. Flexible, lightweight and flow-rate tested to EN 1809:2014 standards, it routes cleanly and reliably across any setup.

Finally, choose your gauge setup:

• Miflex SPG fitted with 80cm Carbon HD hose: lightweight, compact and uncomplicated
• Miflex Double Console with Depth Gauge and SPG: pressure gauge + depth gauge in a compact, easy-to-read console

Package includes:

• Aqualung Leg3nd MBS Stage 3 Regulator Set (First Stage, Second Stage + Leg3nd Octopus)
• Miflex Xtreme BCD Hose
• Miflex  SPG or Double Console

Why you'll love it:

• Master Breathing System (MBS) combines inhalation effort and venturi adjustment into a single one-touch control
• Over-balanced diaphragm first stage automatically increases working pressure at depth for optimum breathing effort
• Three dedicated anti-freeze systems work in combination for exceptional cold-water protection
• ACD seals the inlet on disconnection — keeping the filter clean, lubrication preserved and oxygen compatibility maintained
• Redesigned front cover with radial openings reduces peak inspiratory flow by 20% and resists free-flows in strong currents
• Enlarged second stage heat exchanger actively prevents freezing of the mechanism
• Pneumatically balanced valve automatically compensates for increased ambient pressure as you descend
• Tool-less mouthpiece clamp for quick, waste-free mouthpiece changes
• Patented Comfobite mouthpiece reduces jaw fatigue on longer dives
• Soft Grip DIN and Yoke screws make tank changes easy even with cold hands
• Miflex BCD hose connects cleanly and reliably, flow-rate tested to EN 1809:2014 standards
• Choose your preferred instrument setup: keep it simple with an SPG or add depth with a double console

Key Feature Highlights:

Aqualung Leg3nd MBS First Stage Features:

• Over-balanced (auto-balanced) diaphragm design — progressively increases working pressure with depth for optimum breathing effort
• Environmentally sealed for cold-water performance and contamination protection
• Auto Closure Device (ACD) seals the inlet when disconnected from cylinder — protects filter, lubrication and O2 compatibility
• Dry chamber isolates inner components from outside environment — no moisture, no ice
• Deep heat-exchanging ribs for a large heat exchange surface area (+30% vs Glacia / +70% vs Legend 2)
• Over-moulded cap delays ice forming over the external diaphragm
• Ergonomic bi-material Soft Grip DIN and Yoke screws for easy one-hand installation with cold hands
• Channelled Yoke screw prevents water retention
• Specialised ACD dust cap protects inlet fitting from impacts and damage
• 4 low-pressure ports and 2 high-pressure ports for flexible hose routing

Aqualung Leg3nd MBS Second Stage Features:

• Master Breathing System (MBS) control — single adjuster simultaneously optimises inhalation effort and venturi effect
• One-touch switching between pre-dive and dive settings
• Pneumatically balanced valve automatically compensates for increased ambient pressure at depth
• Redesigned front cover with radial openings reduces peak inspiratory flow by 20%
• Widened openings resist free-flows when diving in strong currents
• Enlarged heat exchanger prevents freezing of the second stage mechanism
• Streamlined bi-material air channel deflector lowers exhalation effort
• Wide-surface overmoulded purge button for easy operation
• Patented Comfobite mouthpiece reduces jaw fatigue and improves second stage stability
• Tool-less mouthpiece clamp — quick, simple and waste-free mouthpiece changes
• Over-moulded elastomer exhaust cover with soft-touch effect
• Flexible, lightweight Aqua Flex hose with dual protectors

Aqualung Leg3nd Octopus Features:

• Paired to match the Leg3nd MBS primary second stage
• Dependable and easy-to-operate backup air source
• Built to the same high standard as the primary second stage

Gauge Options Features:

Miflex SPG fitted with 80cm Carbon HD hose

• Lightweight, compact and durable single pressure gauge
• Heavy-duty construction with ergonomic low-profile housing
• Comfortable grip and easy packing for travel
• Integrated attachment points at the top
• Supplied with durable Miflex 80cm hose
• Pressure gauge compliant with EN250

Miflex Double Console with Depth Gauge and SPG

• Compact double console with simple 1-2 gauge layout
• Combines pressure gauge and depth gauge in one unit
• Depth gauge provides useful backup in case of dive computer issues
• Bright, bold and easy to read at a glance
• Luminescent displays for improved visibility on night dives
• Ergonomic low-profile housing with comfortable grip
• Integrated attachment points at the top
• Lightweight and easy to pack for travel
• Pressure gauge compliant with EN250
• Depth gauge compliant with EN13319

Miflex Xtreme BCD Hose

A flexible, braided hose with standard 3/8" fitting and quick-release coupler, suitable for most BCDs, wings, and drysuits that use a standard QD connection. Every Miflex BCD hose QD fitting flow rate is tested to EN 1809:2014.

Quality Testing & Delivery Timeframe
Every regulator bundle is thoroughly tested before dispatch to ensure top performance. While next-day delivery may be available at checkout, orders placed after 12PM on working days may require an additional day before shipping. If you have any questions, our friendly team is happy to help via online chat or email at support@mikesdivestore.com