Rearden Manufacturing Group Llc Rpb Muzzle Brake 0.375 1/2-28 Threads Square Shoulder Black

The Rearden RPB muzzle brake is a precision-engineered mounting solution built to interface with Plan B type suppressor systems. This .375-caliber brake features 1/2-28 threads and a square shoulder design, machined from 17-4 PH H900 stainless steel and finished in nitride for enhanced durability and seal integrity. If you're running a suppressed rifle on a Plan B platform—whether an Atlas or Atlas XL can—this brake serves as the critical link between barrel and silencer, ensuring repeatable alignment and a tight, consistent fit that minimizes vibration and gas leakage.

Built for shooters who demand precision and reliability, the RPB brake combines rugged construction with exacting tolerances. The nitride finish not only looks professional but also provides superior corrosion resistance and a tighter taper seal—critical for suppressed setups where gas containment matters. Shims are included to help dial in perfect concentricity and shoulder contact. Like any serious muzzle device, proper installation and torque procedure are non-negotiable: clean surfaces, a 30 ft-lb torque spec on the brake itself, and careful alignment ensure this brake will perform as designed and maintain your suppressor warranty. This is the kind of component where cutting corners causes real problems downrange.

The RPB is purpose-built for hunters, competition shooters, and precision rifle enthusiasts running Plan B suppressors. It's not a universal brake—it's a specialist tool for a specific mission. If your suppressor system uses Plan B mounts, this is the mount-to-barrel interface you've been looking for.

Key Features

• 17-4 PH H900 stainless steel construction for strength and corrosion resistance
• Nitride finish improves seal integrity and durability
• Plan B and Atlas/Atlas XL compatible platforms
• Square shoulder design ensures flush, perpendicular contact against the barrel
• 1/2-28 thread pitch (.375 caliber)
• Shims included for precision alignment and concentricity
• Designed for repeatable, tight suppressor mounting

Specifications

Frequently Asked Questions

What suppressors does the RPB muzzle brake fit?

The RPB is compatible with Plan B type suppressor mounts, including Rearden Atlas and Atlas XL cans. Always verify your suppressor's mounting system before purchase, and use an alignment rod to confirm proper setup before final torque.

How do I install and torque the RPB brake?

Clean all mating surfaces thoroughly. Torque the brake to the barrel at approximately 30 ft-lbs, then apply Rocksett (removable threadlocker) to secure it. Use shims as needed to ensure the square shoulder sits flush against the barrel. When mounting your suppressor to the brake, torque the can to 10 ft-lbs and verify alignment with an alignment rod before shooting.

Why does the nitride finish matter?

The nitride finish creates a tighter seal at the taper interface between brake and suppressor, which reduces gas leakage and improves suppression consistency. However, this benefit depends on proper torque and installation—surfaces must be clean and the brake must be square against the shoulder.

What's included with this brake?

The RPB comes with shims to help achieve perfect alignment and square shoulder contact. You'll need to supply your own threadlocker (Rocksett recommended) and torque wrench.