Signal & Steel Flex Expander Wing Pouch – Water Bottle & Utility Expansion for Micro Chest Rigs (MK4 / MK5 / D3CR Compatible)

The Signal & Steel Flex Expander Wing Pouch adds flexible storage to your chest rig without adding bulk or restricting movement. Designed to mount behind compatible placards, this low-profile expansion pouch gives you space to carry essentials like water bottles, radios, grenades, tools, or field gear while keeping your main rig streamlined.

Built for modern micro chest rigs, the Flex Expander mounts cleanly behind placards commonly used in airsoft setups, including MK4/MK5 style rigs and D3CR-style placards. The expandable elastic construction keeps items secure while allowing the pouch to compress flat when not in use.

This makes it ideal for players who want extra carrying capacity without switching to a larger chest rig.

Whether you’re running hydration, radios, or extra field gear, the Flex Expander Wing Pouch keeps your loadout balanced and accessible during long games.

Key Features

• Expandable elastic wing pouch design

• Compatible with many micro chest rigs and placard systems

• Works with MK4 / MK5 style rigs and D3CR-style setups

• Ideal for water bottles, radios, grenades, or utility gear

• Low-profile design compresses when empty

• Adds storage without increasing rig footprint

• Durable construction built for field use

• Designed for airsoft and tactical loadouts

Ideal For

• Airsoft chest rig setups

• Hydration carry on micro rigs

• Radio or utility pouch storage

• Lightweight loadouts

• Expanding micro placard systems