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Yankee Hill Machine Mini Phantom QD Muzzle Brake 9mm 1 2x28 YHM 3109 1MB 28A UPC 841812102014
Product Description
The Yankee Hill Machine Co.® Mini Phantom® Q.D. 9mm Muzzle Brake (SKU: YHM-3109-1MB-28A / UPC: 841812102014) delivers a compact, high-efficiency muzzle management solution engineered specifically for modern 9mm pistol-caliber carbines and sub-gun platforms. Designed to eliminate unnecessary forward muzzle overhang while keeping front-end balance agile, this mini brake measures an ultra-short 1.6 inches overall. It serves a critical dual-purpose role: delivering flat-shooting recoil mitigation when running unsuppressed, and providing an ultra-secure, fast-attach taper mount interface for Phantom-pattern 9mm sound suppressors.
Machined from heat-treated 4140 chrome-moly ordnance steel, the YHM-3109-1MB-28A is built to handle rapid PCC strings and high-volume tactical shooting schedules without throat erosion. Its durable matte black surface conversion treatment resists carbon fouling, harsh bore solvents, and adverse field environments. When shooting suppressed, the brake's dual side-blast ports function as a sacrificial baffle system, diffusing violent high-pressure muzzle blast and significantly reducing carbon and gas erosion on your suppressor's primary blast baffles.
Engineered for duty-grade reliability and competition speed, this muzzle brake utilizes coarse external ACME threads to eliminate carbon lockup after extended firing, backed by precision ratcheting teeth for positive audible and tactile lockup against YHM fast-attach locking collars. Its generous internal clearance ensures clean, unhindered pass-through for all factory 9mm bullet weights. Each unit includes a complete precision shim kit to guarantee true, parallel shoulder seating and exact timing on your host barrel.
*Armorer Bench Notes & Real-World Staging Guidance:*
Fitment Matrix: Direct fit for pistol-caliber carbine and rifle barrels threaded 1/2"-28 UNEF chambered in 9mm Luger (also safe for 5.56 NATO barrels with 1/2"-28 threads). CRITICAL: DO NOT attach 5.56mm or .30 caliber suppressors to this muzzle brake when chambered in 9mm, as a catastrophic baffle strike will occur. Ensure your mounted silencer is bored to .36-caliber/9mm or larger (such as the YHM R9 or Nitro N2O). DO NOT install using a crush washer. Torque to 20–30 ft-lbs with high-temperature threadlocker.
- Ensure the host firearm is completely clear, magazine removed, and chamber visually and physically verified empty before locking the barrel into a dedicated barrel vise block.
- Degrease host barrel threads and brake internal threads thoroughly with non-chlorinated brake cleaner or residue-free acetone, verifying the barrel shoulder is clean and true.
- Perform a dry hand-tight test fit to assess port orientation and calculate the combination of included precision shims needed for level 12 o'clock horizontal alignment.
- Apply 1 to 2 drops of high-temperature threadlocker (Rocksett recommended for suppressor hosts) to the barrel threads, position the shim stack, and torque the brake to between 20 and 30 ft-lbs.
- Drop a dedicated 9mm bore alignment rod through the mounted suppressor and down the barrel to visually verify perfect concentricity before heading to the firing line.
Key Features
- Ultra-Compact 1.6-Inch Footprint: Keeps 9mm PCCs short, agile, and maneuverable around tight barriers without sacrificing flat-shooting recoil control.
- Phantom Q.D. Suppressor Interface: Utilizes coarse ACME threads and ratcheting rear lockup teeth to resist carbon lock and guarantee repeatable return-to-zero.
- Sacrificial Baffle Design: Diverts harsh initial blast energy inside the suppressor chamber, shielding delicate internal silencer baffles from premature erosion.
- Heat-Treated 4140 Steel Construction: Tough alloy architecture stands up to aggressive semi-auto strings, high thermal loads, and rigorous field use.
- Included Precision Timing Shim Kit: Supplies an assortment of color-coded shims to achieve square, perfectly aligned, and concentric barrel shoulder mating.
Product Specifications
- Brand: Yankee Hill Machine Co.® (YHM)
- Model/Series: Mini Phantom® Q.D. 9mm Muzzle Brake
- MPN / SKU: YHM-3109-1MB-28A / 3109-1MB-28A
- UPC: 841812102014
- Thread Pitch: 1/2"-28 UNEF-2B
- Caliber / Through-Bore: 9mm Luger / 9x19mm (Pass-Through Bore ~0.400")
- Overall Length: 1.600"
- Outside Diameter: 1.245"
- Material: Heat-Treated 4140 Chrome-Moly Steel
- Finish: Matte Black Oxide / Melonite
- Mount System: YHM Phantom® Fast-Attach Q.D.
- Platform Compatibility: AR-9, PCCs, Sub-Guns, and Rifles Threaded 1/2"-28
- Installation Torque: 20 to 30 ft-lbs
- Country of Origin: USA
