Dead Air Mask-HD Thread Adapter | FN Five-SeveN to 1/2-28 | DA422

The Dead Air Mask-HD Thread Adapter (MFG# DA422) converts FN Five‑SeveN host threads to a standard 1/2-28 pattern so Mask‑HD silencers and other 1/2-28 muzzle devices can be used on compatible barrels. It is finished in black and is intended to expand the range of hosts a Mask‑HD can be mounted to. Manufacturer-provided attributes indicate it fits FN Five‑SeveN platforms but requires an aftermarket barrel and will not work on OEM factory barrels.

Use this adapter for controlled-range shooting setups and certain competition or accuracy-focused builds where switching muzzle devices between hosts is needed. It facilitates cross-platform compatibility without altering the silencer itself.

Product Specifications

• The manufacturer is Dead Air Silencers.
• The model/part number is listed as DA422.
• The adapter fits FN Five-SeveN hosts per the provided fit data.
• The thread conversion provided is 1/2-28.
• The product type is listed as a Thread Adapter.
• The item description includes 1/2X28 as the target thread pattern.
• The finish/color is specified as Black.
• Additional features include Requires aftermarket barrel as provided by the manufacturer data.
• An additional noted limitation is Will not work on OEM barrel.
• The NFA thread pattern field is given as 1/2×28.
• The package dimensions include a listed length of 6.5, width of 4.0, and height of 0.5 as provided.
• The listed weight value from the data is 0.05 (manufacturer-provided value).
• The product subcategory is Muzzle Devices.
• The listed fit/make-model entry is FN|Five-Seven.
• The UPC is 810128161268.

This adapter is a straightforward way to broaden the compatibility of a Mask‑HD silencer with FN Five‑SeveN platforms when an aftermarket threaded barrel is used. It is compact, finished in black to match common muzzle device aesthetics, and intended for users who need flexible mounting options across multiple hosts.