Dead Air Mask HD Thread Adapter | Sig Mosquito to 1/2-28 | DA420

The Dead Air Mask-HD thread adapter (MFG# DA420) provides a mechanical interface to mount the Mask silencer to Sig Mosquito hosts with 1/2-28 threads. This adapter is a threaded accessory intended to expand platform compatibility for Mask-series devices on rimfire firearms. Typical applications include rimfire training and small-game shooting where platform flexibility is desired. The adapter is finished in black and installs via standard 1/2-28 threads.

Product Specifications

• The manufacturer is Dead Air Silencers.
• The model/part number is listed as DA420.
• The product type is Accessory-Silencer Accessories.
• The adapter is intended for Sig Mosquito hosts (as indicated by the manufacturer).
• The NFA thread pattern is 1/2×28.
• The thread specification is 1/2-28.
• The finish is specified as Black.
• The listed weight is 0.02 (unit not specified by the manufacturer).
• The listed overall length is 7 (unit not specified by the manufacturer).
• The listed width is 4 (unit not specified by the manufacturer).
• The listed height is 0.5 (unit not specified by the manufacturer).
• Can be disassembled: False, per manufacturer attributes.
• Package quantity is listed as EA (each) in the manufacturer data.
• The UPC is 810128161244.

This compact adapter gives owners an uncomplicated way to expand the Mask-HD’s host options without altering the host firearm. Its low-profile black finish maintains a discreet appearance while allowing quick transitions between compatible rimfire platforms for range work or field use.