Rearden Spb Mb .375 5/8-24 Nitride

The Rearden SPB muzzle brake in .375 caliber with 5/8-24 threads and nitride finish is engineered for shooters running Plan B type suppressor mounts who demand a rigid, repeatable interface between barrel and can. Built from 17-4 PH stainless steel and finished in hard black nitride (67 HRC surface hardness), this brake handles the recoil management duties while serving as a precision mounting surface for your suppressor. Whether you're setting up a magnum hunting rifle or a hard-use precision gun, the SPB's design and finish are built to handle repeated suppressor mounting and unmounting cycles without degradation.

Rearden engineered the SPB specifically for compatibility with Atlas and Atlas XL suppressor mounts—two of the most respected quick-detach systems in the industry. The nitride treatment creates a tighter seal and improved wear resistance compared to standard steel finishes, which is critical when you're torquing suppressors on and off in the field. Shims are included (except on SR25/M110 and 11/16×24 variants) to dial in perfect concentricity with an alignment rod, ensuring your entire suppressor system shoots true from day one.

Installation requires care: clean all surfaces, torque the brake to the barrel at 15–25 ft-lbs, and Rockset it for permanent security. When mounting a suppressor, clean threads and taper surfaces, then torque the can to 10 ft-lbs and verify alignment. This isn't a set-it-and-forget-it accessory—it's a precision component that rewards proper setup with years of reliable service.

Key Features

• 17-4 PH H900 stainless steel construction for strength and durability
• Black nitride finish (67 HRC surface hardness) resists wear and corrosion
• Compatible with Atlas and Atlas XL suppressor mounts
• Plan B type mount interface for broad suppressor ecosystem compatibility
• Shims included for precise concentricity alignment
• .375 caliber, 5/8-24 thread pitch for popular magnum and precision rifles

Specifications

Frequently Asked Questions

What suppressors work with the Rearden SPB .375 5/8-24?

The SPB is compatible with suppressors designed for Plan B type mounts, including those from Atlas and Atlas XL systems. Always verify your specific suppressor's mount interface before purchasing. Do not use with Q suppressors, as this will void compatibility and proper function.

Do I need an alignment rod to install this muzzle brake?

Yes. Rearden strongly recommends using an alignment rod during installation to ensure the entire brake and suppressor system is perfectly concentric. This step prevents accuracy issues and ensures a reliable seal when your suppressor is mounted.

Are shims included?

Shims are included with most variants to help achieve perfect concentricity. However, shims are not included with SR25/M110 or 11/16×24 thread pitch versions.

What torque values should I use during installation?

Torque the muzzle brake to the barrel at 15–25 ft-lbs, then Rockset it for permanent security. When mounting a suppressor, torque it to approximately 10 ft-lbs after ensuring threads and tapers are clean and the system is properly aligned.