AAC Halcyon 22LR Rimfire Suppressor

Description

AAC Halcyon 22LR Rimfire Suppressor

The AAC Halcyon 22LR suppressor is built for shooters who want one host to work across a whole rimfire collection, from a suppressed 10/22 for pest control to a compact rimfire pistol for training.

Since the Halcyon breaks down without tools, switching between its 5.8-inch full-length and 3.41-inch compact configurations takes seconds, not a trip to the bench. That modularity means the same can can ride heavy on a rifle for maximum sound reduction one weekend and drop down to 4.5 ounces for a pistol the next. Inside, indexed and shielded titanium K-baffles built from 17-4PH T6 stainless handle the actual work of taming report, while the black PVD finish holds up to repeated handling and cleaning. Because AAC rates the Halcyon for full-auto .22 LR fire, it’s built to outlast far more punishment than a typical weekend range session throws at it.

That same baffle stack also carries a 17 HMR, 22 WMR, and 5.7x28mm rating, so the Halcyon covers most of the rimfire and small-caliber lineup a shooter is likely to own. AAC backs the suppression claim with real numbers too: 42 dB of average reduction and 114 dB S.P.L. tested on a Walther P-22 firing Remington Standard Velocity ammunition. Paired with the direct-thread 1/2×28 mount, that combination makes the Halcyon a practical choice for anyone who wants one suppressor doing the work of several without hauling around extra hardware.

Key Features — AAC Halcyon 22LR Suppressor

• Tool-free modular design shifts between 5.8″ full and 3.41″ compact configurations in seconds
• Indexed, shielded titanium K-baffles built from 17-4PH T6 stainless and titanium
• Rated for full-auto .22 LR fire, plus 17 HMR, 22 WMR, and 5.7x28mm
• Direct-thread 1/2×28 attachment
• Black PVD finish for durability against repeated handling and cleaning
• 42 dB average sound reduction, 114 dB S.P.L. (tested on a Walther P-22 with Remington Standard Velocity ammunition)
• Weighs 4.5 oz in compact configuration, 6.4 oz at full length
• 1.12″ diameter

 

Why This Product Stands Out

Most rimfire suppressors force a choice between size and suppression, but the Halcyon’s modular build sidesteps that trade-off entirely. A shooter running a suppressed 10/22 for hunting can pull the extension for a shorter, lighter footprint on a rimfire pistol the same afternoon, since neither configuration requires a separate purchase or a trip back to a gunsmith. That kind of flexibility matters most to the shooter who owns more than one rimfire platform and doesn’t want a suppressor collection to match.

The titanium K-baffle system is what makes the modularity durable rather than gimmicky. Because the baffles are indexed and shielded, they hold their alignment through repeated tool-free disassembly, which is exactly the kind of maintenance a rimfire can demands given how dirty .22 LR ammunition runs. AAC’s full-auto rating on .22 LR is also a meaningful data point here — it signals a baffle stack built to handle sustained heat and pressure, not just the occasional plinking session.

For shooters who also run 5.7x28mm platforms, the Halcyon’s multi-caliber rating means one suppressor can move between a rimfire rifle and a 5.7 pistol without leaving performance on the table. That kind of cross-platform utility is rare in a can this light, and it’s a big part of why the Halcyon has stayed a go-to rimfire choice.

Ideal Use Cases

• Suppressed rimfire rifle hunting and pest control
• Rimfire pistol training and plinking where hearing protection matters
• Multi-platform use across 22 LR, 17 HMR, 22 WMR, and rated 5.7x28mm hosts
• Shooters who want one suppressor to cover more than one host firearm

 

Technical Specifications

 

Compatibility Information

Host Firearm Compatibility: The Halcyon threads directly onto any host chambered in 22 LR, 17 HMR, 22 WMR, or 5.7x28mm with a standard 1/2×28 muzzle thread, which covers the majority of rimfire rifles and pistols on the market today. Given that AAC rates the baffle stack for full-auto 22 LR fire, the Halcyon also holds up on hosts that see heavier range use than a typical bolt-action trainer.

Thread Compatibility: 1/2×28 direct thread only, per AAC’s published specifications.

NFA COMPLIANCE NOTICE
This item is regulated under the National Firearms Act (NFA). Purchase requires completion of ATF Form 4, and compliance with all federal, state, and local regulations.

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Manufacturer: AAC | Model: Halcyon | Type: NFA Silencer | Caliber: .22 LR (also rated 17 HMR / 22 WMR / 5.7x28mm) | UPC: 850036491019 | SKU: 64283

THIS ITEM TRANSFERS ON AN ATF FORM 4 THROUGH TX ARMS OR YOUR LOCAL FFL/SOT DEALER. ALL NFA RULES AND REGULATIONS APPLY.