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The Angstadt Arms 3-lug muzzle adapter solves the problem of quick, repeatable suppressor mounting on 9mm platforms. If you're running a pistol-caliber carbine, AR-9, or threaded pistol and want the convenience of quick-detach suppressor attachment, this is a straightforward way to get it done. The universal 3-lug interface works with most standard pistol-caliber suppressors from manufacturers like Silencerco, Rugged, Dead Air, and others, plus the Angstadt Arms 3-Lug QD Blast Shield.
Made from hardened steel with a black nitride finish, this adapter is built tough and sized to keep things compact. At 1.42 inches long and 0.9 ounces, it won't add unnecessary bulk to your platform. The 1/2×28 threads are standard across most 9mm AR builds and threaded pistol barrels. The design follows HK specifications, which means tolerances are tight and fitment is consistent across compatible suppressors and mounts.
The adapter comes ready to install without requiring shims. If you want to fine-tune suppressor timing for a specific setup, shims are available and can be used for adjustments. Important note: don't use a crush washer when installing this on your barrel. Just thread it on and torque it down. The 3-lug system itself is tool-free, which makes swapping suppressors between guns quick and simple.
Unlike direct-thread attachments, 3-lug systems rely on a spring-loaded collar mechanism that twists into place. This means no thread engagement happens each time you attach or detach your suppressor, so you get reduced thread wear and consistent alignment shot after shot. It's the reason these systems are so popular with people running suppressed 9mm setups regularly.
The Angstadt Arms adapter works with most standard pistol-caliber suppressors that use a universal 3-lug interface, including models from Silencerco, Dead Air, Rugged Suppressors, and others. It's also compatible with the Angstadt Arms 3-Lug QD Blast Shield. Always confirm compatibility with your specific suppressor manufacturer before purchasing.
No shims are required for standard installation. The adapter threads directly onto 1/2×28 barrels without them. Shims can be used if you want to adjust suppressor timing for a specific setup, but this is optional and depends on your individual platform.
No, this adapter is designed specifically for 9mm and is not compatible with .45 ACP. The 3-lug systems for 9mm and .45 use different specs and are not interchangeable, so make sure you have the right caliber adapter for your platform.
3-lug systems allow tool-free quick-detach of suppressors without wearing out barrel threads each time you attach or remove them. You get consistent alignment and faster attachment and detachment between suppressors, making it ideal if you regularly swap suppressors between different guns.
| UPC | 850035894460 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | AA093LSD28 |
| Caliber/Gauge | 9mm |
| Color | Black |
| Model | |
| Product Type | Adaptor |
| Shipping Weight | 0.07 |
| Thread Pattern | 1/2"x28 |
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