Description
MPN: ARM2964-BLK
Features:
All-in-One .30 Cal Combo: Includes the Catacomb Micro Muzzle Brake and Mini-Reactor Blast Shieldrun the brake alone or thread on the shield when you want reduced blast
Plan B / Atlas Compatible: Designed to interface directly with Plan B / Atlasstyle suppressor systems for secure, repeatable mounting
No Timing Required: 360° port geometry eliminates the need for a crush washer or shims
Compact Recoil Control: Micro brake design helps reduce recoil and muzzle movement without adding unnecessary length
Quick-Attach Blast Shield: Mini-Reactor threads over the Catacomb to help manage blast in close or team environments
.30 Cal Fitment: 5/8×24 threads for .30-caliber rifles such as .308 and 300 BLK
Hard-Use Finish: QPQ black nitride for excellent heat, wear, and corrosion resistance
Made in the USA: Designed and manufactured by Armaspec with a lifetime warranty
Specifications:
Caliber: .308 Win. / 7.62 NATO / 300BLK / Other .30 Cal.
Material: Steel
Finish: Black Nitrite
Weight: 5.71 oz.
Length: 2.95″
Outer Diameter: 1.12″
Bore Diameter: 0.37″
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
1x Armaspec Mini-Reactor Blast Shield
Details:
The Armaspec .30 Cal Catacomb Muzzle Brake with Mini-Reactor Blast Shield is built around a major advantage for modern suppressor users: direct compatibility with Plan B / Atlas suppressor mounting systems. Theres no separate adapter, no stacking parts, and no need to reconfigure your muzzle setup. The Catacomb itself serves as the mounting interface, allowing Plan B / Atlascompatible suppressors and accessories to thread on cleanly and repeatably with a single, purpose-built device.
Micro Brake Design with a Flexible Role
On its own, the Catacomb functions as a compact muzzle brake that manages recoil on .30-caliber rifles while keeping overall length to a minimum. The brake uses 360-degree porting, which spreads gas evenly around the body to smooth the recoil impulse and eliminate the need for timing. Installation is simplethread it on and torque it down. No shims, no crush washers, and no clocking required.
Mini-Reactor Blast Shield for Better Range Manners
When shooting indoors, in tight spaces, or on crowded firing lines, the Mini-Reactor Blast Shield threads directly onto the Catacomb. Once installed, it redirects blast and concussion forward, making the rifle noticeably more comfortable for both the shooter and anyone nearby. When you want to return to the lightest, shortest configuration, the shield spins off in seconds. One muzzle device, two distinct roles, no extra mounts.
Built for Real .30-Caliber Use
Both the Catacomb brake and the Mini-Reactor blast shield are finished to withstand the heat, pressure, and carbon associated with .308-class rifles and other .30-cal platforms. The low-profile design keeps the rifle balanced and avoids the bulky appearance common with oversized brakes or multi-piece mounting systems.
A Clean, Modular Plan B / Atlas Solution
For shooters running a .30-cal rifle who want Plan B / Atlas compatibility, meaningful recoil control, and the ability to adapt quickly to different shooting environments, the Armaspec Catacomb with Mini-Reactor delivers flexibility without unnecessary complexity. Its a streamlined solution that stays compact, installs cleanly, and adapts easily to how and where you shoot.
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