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The Fletcher ST-174 Hub Mount Taper Adapter bridges the gap between Plan B-style muzzle devices and hub-mount suppressors. Built from heat-treated 17-4 stainless steel, this adapter uses a precision tapered interface to create a rock-solid mechanical connection without relying on springs or ratchets. The design traps carbon in front of the taper, keeping your threads cleaner and reducing wear on critical components.
The ST-174 uses fine right-hand threads matched with a tapered geometry that ensures consistent point-of-impact every time you attach or remove your suppressor. The tapered design creates a tight seal that maintains alignment under recoil, so you don't have to worry about your suppressor shifting between shots. Unlike fixed spring-loaded systems, this mechanical interface relies on precise tolerances to deliver reliable performance session after session.
Forged from heat-treated 17-4 stainless, the ST-174 handles the rigors of regular use while resisting corrosion in all weather conditions. This material offers excellent strength-to-weight characteristics, keeping your front end balanced without adding unnecessary bulk. Fletcher's manufacturing ensures tight tolerances throughout, so every adapter functions smoothly and securely.
The ST-174 threads directly onto any Plan B-compatible muzzle device and accepts any hub-mount suppressor with industry-standard 1.375×24 threads. Hand-tighten it onto your muzzle device, screw your suppressor over top, and you're ready to shoot. The simplicity of this system means you can swap suppressors between different rifles without fumbling with extra hardware. If you run multiple suppressed setups, this adapter lets you consolidate your can collection and move it between hosts effortlessly.
The ST-174 works with any suppressor that features industry-standard 1.375×24 HUB threading, including models from SilencerCo, Dead Air, Rugged, YHM, CGS, and others. If your suppressor has HUB threads, it will thread onto this adapter. Always verify bore diameter compatibility with your specific suppressor before use.
Yes, using an alignment rod before firing is recommended practice with any suppressor adapter system to verify concentricity between the barrel, adapter, and suppressor. Even though the tapered interface promotes alignment, an alignment rod confirms everything is centered and safe before you take the first shot.
Absolutely. The beauty of the Plan B system is modularity. The ST-174 will thread onto any Plan B-compatible muzzle device, letting you share it across multiple rifle setups. This makes it an economical choice if you run several suppressed rifles with Plan B brakes or flash hiders.
The adapter adds minimal length to your system, typically around 0.2 inches or less depending on how it seats. The compact profile keeps your overall length manageable while maintaining the secure tapered lockup between your muzzle device and suppressor.
| UPC | 850044307760 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | ST174HUBPB |
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