The Rearden FHD (Flash Hider Device) 5/8x24 (MPN: 10020) is a high-performance 3-prong muzzle device designed for both flash mitigation and as a suppressor mount. It is part of the "Plan B" ecosystem, making it a popular choice for shooters looking for a lightweight, secure mounting solution.
Core Specifications
- Thread Pitch: 5/8x24 TPI (Standard for most .30 caliber/7.62mm rifles like .308 Win, 300 Blackout, 6.5 Creedmoor).
- Shoulder Style: Square Shoulder (This model, 10020, is designed for traditional barrels with a 90-degree shoulder).
- Material: 17-4 PH Stainless Steel (H900 Heat Treat).
- Finish: "Heat Treat" (often appears as a wheat/gold straw color; also available in Black Nitride under different SKUs).
- Bore Diameter: .375" (Safe for calibers up to 9mm and .338 Lapua).Length: 1.723" overall (adds approximately 1.098" to the barrel length).
- Weight: ~1.69 oz.
Compatibility
This device is a taper-mount interface that works with the following suppressor adapters:
- Rearden Atlas / Atlas XL
- Q LLC Plan B
- Liberty Precision Machine (LPM) Liberty Bell
- Wolfman / Ghost / Nomad (when equipped with a Plan B-style adapter)
Installation Notes
- Wrench Flats: This is the updated version with enlarged rear wrench flats, making it much easier to torque down or remove if it gets "carbon locked."
- Torque Spec: Recommended 25–30 ft-lbs. Rearden typically recommends using Rocksett for a permanent/semi-permanent install to ensure the muzzle device doesn't unscrew when you're removing your suppressor.
- Shims: Shims are not included. Since it is a 3-prong flash hider, it does not technically require "timing" (alignment) for performance, but you may want shims if you want the prongs to sit in a specific orientation.
