Rearden Dpb Mb .280 1/2-28 Nitride

The Rearden DPB muzzle brake in .280 caliber with 1/2-28 threading and nitride finish is engineered for shooters who demand a robust, corrosion-resistant brake compatible with Plan B quick-detach suppressor systems. Built from 17-4 PH H900 stainless steel and finished in black nitride to 67 HRC surface hardness, this brake provides durability in field conditions while offering the tight seal performance that nitride surfaces deliver when properly installed. It's built for hunters and long-range shooters running Atlas or Atlas XL suppressors through Plan B mounts.

The DPB features larger wrench flats on the rear for easier installation and removal—a practical upgrade that makes field work and cleaning less frustrating. The nitride finish does create a tighter interface with suppressor mounts, which means precise setup is critical: you'll want to use an alignment rod during installation and torque the brake to approximately 30 ft lbs, then apply Rocksett to lock it permanently to the barrel. This isn't a bolt-on-and-forget component; it's a permanent installation that demands attention to detail.

Included shims allow you to fine-tune the brake's timing for different suppressor configurations. The Atlas adapter overrun is approximately 1.600" and the Atlas XL adapter overrun is approximately 0.750", so measure your setup before ordering to confirm fitment with your specific rig. Note that this brake is designed for Plan B-type mounts and is intended for use with compatible suppressor systems.

Key Features

• 17-4 PH H900 stainless steel construction for strength and corrosion resistance
• Black nitride finish rated to 67 HRC surface hardness for durability and tighter suppressor seal
• Compatible with Atlas, Atlas XL, and Plan B quick-detach suppressor systems
• Enlarged wrench flats for easier installation and field serviceability
• Shims included for adapter timing adjustment
• Requires permanent installation with Rocksett and alignment verification

Specifications

Frequently Asked Questions

Is the Rearden DPB compatible with my suppressor?

The DPB is designed for Plan B quick-detach mounts and is compatible with Atlas and Atlas XL suppressors running that mount system. Confirm your suppressor's mount type before ordering. Note that using this brake with a Q suppressor voids the warranty.

What's the proper installation process?

Use an alignment rod to ensure the entire system is square and properly aligned. Clean all surfaces thoroughly, torque the brake to approximately 30 ft lbs, then apply Rocksett to lock it permanently to the barrel. When mounting the suppressor, torque it to 10 ft lbs and verify alignment. This is a permanent installation, not a field-removable component.

Will the nitride finish affect suppressor mounting?

Yes. The nitride finish creates a tighter seal with suppressor mount interfaces, which is why proper torque and Rocksett application is critical during installation. Ensure threads and tapers are clean before mounting your suppressor.

What shims are included?

Shims are included to allow you to adjust the timing of your brake relative to your suppressor adapter. This helps optimize suppressor alignment in your specific configuration.