The Dead Air Armament GSG 1911 Thread Adapter (Dead Air part no. DA421) converts the factory threads on a GSG-1911 pistol to the industry-standard 1/2×28 pattern used by most rimfire suppressors. Dead Air Silencers machines this adapter from steel and finishes it in a durable nitride black coating, matching the fit and finish of the suppressors it’s designed to host. It’s purpose-built to mount a Dead Air Mask-HD, or any other rimfire suppressor threaded in 1/2×28, onto a GSG-1911 without modifying the host firearm. Because it’s a thread adapter and not a suppressor itself, buying one requires no ATF Form 4 or tax stamp; only the actual suppressor you attach to it is the regulated item. It’s a straightforward way for GSG-1911 owners to run their existing 1/2×28 cans without hunting down a proprietary mount.

Key Specifications

• Cut with right-hand 1/2×28 threads, the industry-standard pattern for rimfire suppressors.
• Machined from steel for long-term durability under repeated mounting and removal.
• Finished in nitride black, a hard, corrosion-resistant coating that matches most modern suppressor finishes.
• Purpose-built to fit the GSG-1911 pistol’s factory barrel threads.
• Compatible with the Dead Air Mask-HD and other suppressors threaded in 1/2×28.
• Ships with a thread protector to guard the exposed threads when the suppressor isn’t mounted.
• Classified as a Title I accessory, so no ATF Form 4 or transfer tax applies to the adapter itself.
• Compact and lightweight, adding minimal bulk or weight to the muzzle.
• Installs directly onto the factory threads with no gunsmithing or barrel modification required.

Frequently Asked Questions

Is this adapter itself an NFA item? No. It’s a Title I accessory, only the suppressor you thread onto it is a regulated NFA item.

What thread pitch does it convert to? It converts the GSG-1911’s factory threads to the widely used 1/2×28 rimfire pattern.

Will this fit my Dead Air suppressor? It’s built to mount the Dead Air Mask-HD, along with any other suppressor threaded in 1/2×28.

Buy the Dead Air Armament GSG 1911 Thread Adapter

Running a 1/2×28 suppressor on a GSG-1911 shouldn’t require custom gunsmithing, and this adapter solves that problem with a precise, durable fit straight from the factory-thread pattern. It’s a small part that makes a big difference in getting your host pistol and your can working together cleanly. Order it from our Class 3 parts and accessories lineup for fast, direct shipping to your door.