Description
MPN: ARM2963-BLK
Features:
- Plan-B / Atlas Compatible Suppressor Mount: Features Plan-B–style outer threads and serves as the direct suppressor interface, eliminating the need for any additional adapters
- No Timing Required: True 360° port design means no crush washer or shims
- Compact Recoil Management: Micro brake geometry reduces recoil and muzzle movement without adding unnecessary length or weight
- .30 Cal Fitment: 5/8×24 threading for .30-caliber rifles such as .308, 300 BLK, and similar platforms
- Streamlined, Low-Profile Design: Keeps the rifle balanced and clean while remaining suppressor-ready
- Hard-Use Construction: Precision machined with a QPQ black nitride finish for excellent heat, wear, and corrosion resistance
- Made in the USA: Designed and manufactured by Armaspec and backed by a lifetime warranty
Specifications:
- Caliber: .308 Win. / 7.62 NATO / 300BLK / Other .30 Cal.
- Material: Steel
- Finish: Black Nitrite
- Weight: 1.66 oz.
- Length: 1.73"
- Outer Diameter: 0.9"
- Bore Diameter: 0.38"
- Thread: 5/8"-24
Compatibility:
- .30 Cal. barrel with 5/8"-24 thread pitch
- Plan B Mounting Systems:
- Rearden Atlas
- Diligent Defense Zilch
- Other Plan B compatible mounts
Includes:
- 1x Armaspec .30 Cal. Catacomb Muzzle Brake with Plan-B Outer Threads
Details:
The Armaspec .30 Cal Catacomb Muzzle Brake with Plan B outer threads is built for shooters who want a compact muzzle device that does more than simply tame recoil. Its defining advantage is right on the outside: integrated Plan B / Atlas–style threads that allow compatible suppressors and accessories to mount directly to the brake. There’s no adapter to add length, no extra parts to manage, and no stacking tolerances. The result is a shorter, cleaner, and more repeatable mounting interface at the muzzle.
No Timing, No Washers, No Guesswork
The Catacomb uses full 360-degree porting, which removes the need for timing during installation. You thread it on, torque it against the shoulder, and you’re finished. There are no shims to stack, no crush washers to fight, and no port alignment to worry about. That simplicity speeds up installation and eliminates variables that can affect consistency on a precision .30-cal rifle.
Compact Brake with Controlled Recoil
Despite its small footprint, the Catacomb functions as an effective micro brake. The evenly distributed porting smooths the recoil impulse and helps control muzzle movement without adding unnecessary length or weight to the front of the rifle. This makes it especially well suited for suppressed or suppressor-ready builds where keeping overall stack height and balance in check matters.
Built for Heat, Pressure, and Repeatable Mounting
Finished to handle the demands of .308-class platforms, the Catacomb is designed to withstand high heat, carbon buildup, and frequent mounting cycles. The Plan B–compatible outer threads provide a consistent, repeatable interface for attaching and removing suppressors or accessories while maintaining proper alignment shot after shot.
A Clean Foundation for Plan B–Based Builds
If you’re building a .30-cal rifle around the Plan B / Atlas ecosystem and want a low-profile muzzle brake that installs cleanly and stays versatile, the Armaspec Catacomb delivers exactly that. It’s compact, straightforward, and purpose-built for modern suppressed setups that value simplicity and consistency at the muzzle.
