Rearden R2S Fh 1/2-28 Nitride

The Rearden R2S flash hider with 1/2-28 threading and nitride finish is a Plan B mount-compatible muzzle device built for shooters running suppressed AR platforms. If you're mounting a can on an Atlas or Atlas XL barreled upper, the R2S gives you a rock-solid platform—literally. The black nitride finish provides a durable, corrosion-resistant surface hardened to 67 HRC, and its design supports a tight seal interface when torqued and Rockset properly to your barrel. This is the kind of precision component where setup matters; take the time to square everything up, and you'll get consistent performance that holds alignment cycle after cycle.

What sets the R2S apart is its compatibility ecosystem and finish quality. The nitride coating creates a tighter seal than bare steel, which is excellent for suppressor mounting—but it also means your installation procedure can't be sloppy. Use an alignment rod during setup, clean all threads and tapers thoroughly, and torque your muzzle device to spec (15–25 ft lbs to the barrel, then 10 ft lbs for the suppressor). Your barrel may need a shim if the manufacturer didn't machine a thread relief; that's normal and worth checking before assembly.

The R2S is built for serious suppressed shooting where repeatability and durability matter. Whether you're precision rifle shooting, tactical training, or running a modern sporting rifle under hearing protection, this muzzle device gives you the mounting platform to do it right—just respect the torque specs and don't skip the Rockset.

Key Features

• Plan B mount compatible (Atlas and Atlas XL barreled upper systems)
• Black nitride finish with 67 HRC surface hardness for corrosion resistance and durability
• 1/2-28 threading for standard AR-platform barrels
• 17-4 PH stainless construction for strength and longevity
• Designed for precision suppressor mounting and alignment

Specifications

Frequently Asked Questions

Is the Rearden R2S compatible with my AR platform?

The R2S is designed for Plan B type mounts and is compatible with Atlas and Atlas XL barreled uppers. If you have a standard 1/2-28 threaded barrel, it will physically fit, but for guaranteed alignment and performance, confirm your upper supports Plan B mounting.

Do I need shims for installation?

Shims are not included, but your barrel may need one if the manufacturer didn't cut a thread relief. Check your barrel before assembly; if it requires a shim for square seating against the shoulder, you'll need to source it separately.

Can I use this with any suppressor?

The R2S is designed for suppressor mounting, but always use an alignment rod to verify the entire system sits square. Clean all threads and tapers, and torque the suppressor to 10 ft lbs. Do not use with Q suppressors—that combination voids Rearden's warranty.

What's the proper installation procedure?

Use an alignment rod during setup to ensure everything is square. Clean all surfaces, torque the muzzle device to the barrel at 15–25 ft lbs, then Rockset it. When installing your suppressor, clean threads and tapers again, and torque to 10 ft lbs while maintaining alignment.