Rearden R2S Fh 5/8-24 Nitride
The Rearden R2S Flash Hider with 5/8-24 threading and nitride finish is a Plan B-compatible muzzle device built for shooters who demand precision and durability. This flash hider pairs with Plan B type suppressors and muzzle brake systems, making it a solid choice for AR platform rifles, precision builds, and suppressor-ready setups where a clean, repeatable interface matters. The black nitride finish delivers both a professional look and practical corrosion resistance, while the 17-4 PH stainless steel construction ensures the durability needed for everything from range days to field use.
Installation and alignment are critical with any muzzle device, especially one that'll host a suppressor. The nitride finish creates a tighter seal than untreated steel, which is good news for performance but means proper torque and timing are non-negotiable. You'll want to use an alignment rod during setup, torque the device to 15–25 ft-lbs against the barrel shoulder, and Rockset it for security. If you're threading a suppressor on top, clean the threads and tapers, then torque to 10 ft-lbs and verify alignment once more.
One thing to know: shims aren't included, and your barrel may need one if the manufacturer didn't machine a thread relief. This is especially worth checking if you're doing a custom build or swapping barrels. The R2S is Atlas and Atlas XL compatible as well, so if your setup uses those platforms, this device will nest in cleanly.
Key Features
- Plan B type mount compatible—pairs seamlessly with suppressor and muzzle brake systems
- 17-4 PH stainless steel with black nitride finish (67 HRC surface hardness) for corrosion resistance and durability
- Tighter seal thanks to nitride finish—optimizes suppressor performance when properly installed
- Atlas and Atlas XL platform compatible
- 5/8-24 thread pitch—standard for AR-pattern rifles and many bolt-action platforms
Specifications
| Brand | Rearden |
| Product | R2S Flash Hider |
| Thread Pitch | 5/8-24 |
| Finish | Black Nitride (67 HRC) |
| Material | 17-4 PH Stainless Steel |
| Mount Type | Plan B Compatible |
| Compatibility | Atlas, Atlas XL Platforms |
| Recommended Torque (Device to Barrel) | 15–25 ft-lbs |
| Recommended Torque (Suppressor to Device) | 10 ft-lbs |
| Shims Included | No |
Frequently Asked Questions
Is the Rearden R2S compatible with suppressors?
Yes. The R2S is designed to work with Plan B type suppressors. When mounting a can, ensure threads and tapers are clean, torque to 10 ft-lbs, and verify alignment. Note that using it on a Q suppressor voids the manufacturer's warranty.
Do I need shims for this muzzle device?
Shims are not included. Your barrel may need one if the manufacturer didn't cut a thread relief into the muzzle. It's worth checking your barrel specs or contacting the barrel maker before installation.
What torque specs should I use during installation?
Torque the muzzle device to the barrel at 15–25 ft-lbs, and Rockset it for permanent security. If you'll be threading a suppressor onto the R2S, use an alignment rod to verify concentricity, then torque the suppressor to 10 ft-lbs and check alignment again.
What platforms is this compatible with?
The R2S works with Plan B type mounts and is compatible with Atlas and Atlas XL platforms. It features standard 5/8-24 threading common to many AR-pattern rifles and bolt-action builds.

