Rearden Manufacturing Group Llc Spb Muzzle Brake 0.5 11-16-24 Threads Square Shoulder Black

The Rearden SPB muzzle brake with 11/16-24 threads and square shoulder design is built for shooters who run Plan B compatible suppressor mounts and demand rock-solid repeatability. If you're integrating a suppressor into your rifle setup, this brake serves as the interface between your barrel and your silencer—and getting it right matters. Rearden machines these brakes from 17-4 PH H900 stainless steel and applies a black nitride finish for corrosion resistance and improved sealing surface. The square shoulder geometry means it seats flush and square to your barrel, eliminating cant that degrades suppressor performance and accuracy.

This specific brake is designed for compatibility with Plan B suppressor mounting systems, including Atlas and Atlas XL adapters. The 11/16-24 thread pitch is a common magnum rifle standard—verify your barrel threading before purchase. Rearden includes shims in the box (with the exception of SR25/M110 and some specialty configurations), which let you fine-tune fit and seating if needed. The nitride finish on the steel does tighten tolerances slightly, which is why proper torque and permanent locking are critical: this isn't a quick-swap brake.

Installation requires attention to detail. You'll need an alignment rod to verify that your entire suppressor stack sits concentrically on the bore—misalignment causes baffle strikes and catastrophic silencer failure. Torque the brake itself to 15–25 ft-lbs and then lock it with Rockset or equivalent threadlocker. Once the suppressor threads on, use 10 ft-lbs torque and confirm alignment one final time. Keep all mating surfaces clean; nitride finishes perform best when threads and tapers are free of debris. This is precision equipment, not a drop-in part.

If you run a Q Innovations suppressor, Rearden notes that using this brake with their cans voids warranty—stick to Plan B compatible systems. Serious long-range hunters, precision rifle competitors, and dedicated suppressed shooters who prioritize consistency should find real value in this brake's construction and fit quality.

Key Features

• Machined from 17-4 PH H900 stainless steel for durability and repeatability
• Black nitride finish (67 HRC surface hardness) for corrosion resistance and improved seal
• Plan B suppressor mount compatible (Atlas and Atlas XL adapters)
• Square shoulder design for flush, square seating to barrel
• 11/16-24 thread pitch for magnum rifle applications
• Shims included to fine-tune fit and alignment (with noted exceptions)
• Designed for permanent installation with threadlocker and proper torque

Specifications

Frequently Asked Questions

Will this brake work with my suppressor?

The Rearden SPB is designed for Plan B compatible suppressor mounts, including Atlas and Atlas XL adapters. It is not compatible with Q Innovations suppressors—doing so voids Rearden's warranty. Verify your suppressor's mounting system before purchase.

What does 11/16-24 mean, and how do I know if my barrel has this threading?

11/16-24 refers to the thread pitch: 11/16 inch diameter with 24 threads per inch. This is a standard magnum rifle threading. Check your barrel specification or have a gunsmith confirm your thread pitch before ordering.

Do the shims come with this brake?

Yes, shims are included to allow you to fine-tune fit and alignment—with the exception of SR25/M110 and certain other specialty configurations, which ship without shims.

Why do I need an alignment rod, and what happens if I don't use one?

An alignment rod ensures your entire suppressor system sits concentrically on the bore. Misalignment causes the suppressor's baffles to strike the bullet, which ruins the silencer and creates a dangerous over-pressure condition. Always check alignment before firing.