Reliable Backup When It Matters

The R105 Octopus is a dependable alternate air source designed to deliver simple, consistent breathing when it’s needed most.

Built with a classic downstream design and durable internal components, it’s a straightforward, reliable option for divers who want a backup they don’t have to think about.

Why We Like It

Simple, Reliable Performance
The classic downstream design is known for consistency and ease of use.

High Visibility for Safety
Bright yellow hose makes it easy to locate quickly in an emergency.

Durable Internal Build
Metal valve housing adds strength and long-term reliability.

Flexible Setup Options
Reversible hose attachment allows for different configurations, including pony or stage setups.

Key Features

• Classic downstream second stage design
• High-visibility yellow hose (39 in / 1 m)
• Metal valve housing for durability
• VIVA (dive/pre-dive) switch
• Reversible hose configuration
• Hi-flow mouthpiece for comfort

Ideal For

• Recreational divers
• Backup air source setups
• Rental and training use
• Pony or stage bottle configurations

Specs

2nd Stage Design: Unbalanced (downstream)
Adjustable: No

Hose Length:

• 39 in / 1 m

Weight: 0.897 lb

Use: Recreational diving

Blue Holic Tip 🌊

Your octo should always be secure, visible, and easy to access. Pair this with a clip or holder so it stays exactly where you expect it.

A Backup That Breathes Like Your Primary

The Atomic B2 Octopus is designed to deliver primary-level breathing performance in a backup regulator.

Built with titanium components and the same platform as the B2 primary second stage, this octo is made to be reliable, comfortable, and ready when you need it—without compromise.

Why We Like It

Breathes Like a Primary Regulator
Unlike most octos, this is built on a full-performance platform—making it feel natural and easy to breathe from in a real situation.

Corrosion-Resistant Titanium Build
Titanium components help prevent internal corrosion, which is especially important for gear that isn’t used as often.

Comfortable, Natural Movement
The Comfort Swivel allows the hose to rotate with you, reducing pulling and improving comfort.

High Visibility & Easy Access
Bright yellow front cover and longer hose make it easy to locate and deploy quickly.

Minimal Adjustment Needed
Automatic Flow Control (AFC) manages airflow without constant tuning.

Key Features

• Pneumatically balanced second stage
• Titanium internal components
• Patented Automatic Flow Control (AFC)
• Patented Comfort Swivel (30° rotation)
• 36” high-visibility yellow hose
• Rapid adjustment knob (for special situations)
• Compact, low-profile exhaust design
• High-visibility yellow front cover

Ideal For

• Divers using Atomic regulator systems
• Divers who want a high-performance backup
• Frequent divers
• Travel and recreational diving
• Divers prioritizing comfort and reliability

Specs

2nd Stage Design: Pneumatically balanced

Hose Length:

• 36 in

Materials:

• Titanium components
• Technopolymer front cover

Features:

• AFC (Automatic Flow Control)
• Comfort Swivel

Blue Holic Tip 🌊

If you can afford it, having a backup regulator that breathes just as easily as your primary, thats luxury. This can be especially important in real situations where comfort and control matter.