Description
MPN: ARM2961-BLK
Features:
- Plan B / Atlas Compatible Pair: Catacomb mounts your suppressor via a precision taper + external threads; Mini-Reactor threads over Plan B/Atlas-style devices—perfect, seamless interface
- QD-Style Blast Control: Mini-Reactor drives concussion and noise forward, making indoor, team, and barricade work more comfortable—without killing brake/comp performance
- Timing, No Crush Washer: Catacomb’s 360° port geometry means you just torque to spec—no clocking or washers needed
- Direct Suppressor Mount: Catacomb does not need an extra adapter—the device itself is the mount
- Hard-Use Finish: QPQ black nitride on both parts for heat, wear, and corrosion resistance.
- True AR Fitment: Catacomb in 1/2×28 (.223/5.56)—drop-in for standard AR-15 barrels
- Protects Your Threads: Mini-Reactor doubles as a thread/impact guard when you’re running unsuppressed
- Made in the USA + Lifetime Warranty: Armaspec backs both with U.S. manufacturing and lifetime coverage
Specifications:
- Caliber: 5.56 NATO / .223 Rem.
- Material: Steel
- Finish: Black Nitrite
- Weight: 6 oz.
- Length: 2.95"
- Outer Diameter: 1.12"
- Bore Diameter: 0.26"
- Thread: 1/2"-28
Compatibility:
- .223/5.56 barrel with 1/2"-28 thread pitch
- Plan B Mounting Systems:
- Rearden Atlas
- Diligent Defense Zilch
- Other Plan B compatible mounts
Includes:
- 1x Armaspec 5.56 Catacomb Muzzle Brake with Plan-B Outer Threads
- 1x Armaspec Mini-Reactor Blast Shield
Details:
You get compact recoil control from the Armaspec Catacomb Micro Muzzle Brake and the option to tame side concussion on demand. The Catacomb is a true micro brake with an integrated Atlas/Plan B–style taper and external threads, so it doubles as a direct mount for accessories without extra adapters. Thread the Mini-Reactor over that same interface to add a slim blast shield that sends concussion forward for indoor bays, team drills, or tight barricades—run it bare when you want the shortest nose, add the shield when the environment calls for manners.
Micro Brake with Direct-Mount Interface
The Catacomb’s built-in taper-and-thread setup means your Plan B/Atlas-compatible gear attaches straight to the brake. There’s no separate adapter stack, which keeps the muzzle short, clean, and rigid. You get real braking in a minimal footprint and an accessory-ready front end that doesn’t complicate your build.
Blast Shield When You Need It
The Mini-Reactor threads directly over the Catacomb’s exterior, acting as a compact blast shield that pushes pressure downrange. It takes the sting out of lateral blast for close-quarters training, shared firing lines, and confined spaces—then spins off when you want the lightest, most compact configuration.
Quick Changes, Same Zero Feel
Because the brake and shield share the same precision taper/thread interface, the Mini-Reactor installs and removes in seconds and seats the same way every time. Alignment stays true, and the rifle’s balance doesn’t get weird—the combo remains short and light compared to bulky multi-piece mounts.
Tool-Light, Straightforward Installation
The 5.56 Catacomb uses 1/2×28 threads and 360° porting, so there’s nothing to clock: seat it against the shoulder and torque to spec—no crush washer, no shims. The Mini-Reactor then threads directly over the Catacomb’s Atlas/Plan B–style exterior with no collars or extra hardware. It’s a simple, range-friendly setup you can configure on the fly.
Durable Materials, Range-Ready Finish
Both parts wear a QPQ black nitride finish to resist heat, carbon, and weather. The Mini-Reactor’s stainless construction and the Catacomb’s hardened treatment are built for high-volume days and frequent on/off cycles without loosening or gumming up over time.
Who It’s For
If you want a 5.56 muzzle solution that stays minimal yet goes “range friendly” in seconds, this brake-and-shield pairing nails the brief. You get control when running bare, forward-directed manners when space is tight, and a direct-mount interface that keeps your workflow fast and consistent—no extra adapters, no reconfiguration.
