The Dead Air Mask Adapter, FN 5.7 to 1/2×28 (Dead Air part no. DA422) is the host adapter that lets the Mask HD suppressor mount to an FN 5.7 pistol. Dead Air sells Mask adapters for a short list of popular hosts, and this is the one cut for the FN 5.7, also sold as the Five-seveN. It converts the host to a 1/2×28 thread so the Mask can thread on. Dead Air rates the Mask HD for rimfire, 5.7×28, .22 Hornet and .17 Hornet, which puts the 5.7×28 round of this pistol on its list. It is a small part, but the right one for owners who want the Mask on this specific platform.

Key Specifications

• The host pistol is the FN 5.7, the specific platform this adapter is cut for.
• The output thread is 1/2×28, the pattern the Mask HD mounts onto.
• It is part of the Mask adapter line, which also covers the Walther P22, SIG Mosquito and GSG 1911 as separate parts.
• The suppressor it serves is the Mask HD, a .22 caliber bore design with a titanium and stainless steel build.
• The Mask HD is rated for rimfire, 5.7×28, .22 Hornet and .17 Hornet, as published in the maker fitment guide.

Frequently Asked Questions

Which pistol does this adapter fit? It is the FN 5.7 version of the Dead Air Mask adapter, converting that pistol to a 1/2×28 thread for the Mask HD.

Is this the same part as the other Mask adapters? No. Dead Air sells separate Mask adapters for the Walther P22, the SIG Mosquito, the GSG 1911 and the FN 5.7, each cut for its own host. This listing is the FN 5.7 adapter only.

What caliber rating does the Mask HD carry? Dead Air lists the Mask HD for rimfire, 5.7×28, .22 Hornet and .17 Hornet, with a .22 caliber bore.

Buy the Dead Air Mask Adapter, FN 5.7 to 1/2×28

Getting a suppressor onto an unusual host starts with the right thread. This adapter is the piece Dead Air cut for the FN 5.7, so the Mask HD lands on a standard 1/2×28 interface. Order it from our Lubbock, Texas gun shop for fast direct shipping, and look through our other suppressor parts and accessories for related hardware.