The Dead Air Mask-HD Thread Adapter is designed for FN 5.7 platforms equipped with an aftermarket barrel. Its 1/2×28 thread pattern supports compatibility with the Mask-HD system.

This black thread adapter is intended for users who need a dedicated interface between a compatible FN Five-seveN host and their Mask-HD. It will not work with an OEM barrel.

Key Specifications

• The product type is a thread adapter for the Mask-HD.
• The listed fit is FN Five-seveN.
• The adapter uses a 1/2×28 thread pattern.
• The adapter is intended for an aftermarket barrel.
• The finish is black.
• The adapter will not work with an OEM barrel.
• The adapter cannot be disassembled.

For compatible FN 5.7 setups, this adapter provides a purpose-built connection point for the Mask-HD while keeping the configuration focused and straightforward. Its clearly defined fit and thread pattern make it a practical addition to an appropriately configured host platform.