Yankee Hill Machine Mini Phantom QD Muzzle Brake 5 8x24 30 Cal YHM 3102 1MB 24A UPC 841812100812
Product Description
The Yankee Hill Machine Co.® Mini Phantom® Q.D. Muzzle Brake (SKU: YHM-3102-1MB-24A / UPC: 841812100812) is an ultra-compact muzzle interface engineered for serious tactical carbine and precision bolt-action platforms chambered in .30 caliber and smaller. Built to solve the excess forward length and front-heavy balance issues typical of standard quick-detach devices, this mini muzzle brake trims overall length down to just 1.6 inches. It functions as both a dedicated, recoil-taming muzzle brake when shooting unsuppressed and an exceptionally rigid, fast-attach mounting hub for YHM Phantom-pattern silencers.
Precision-machined from ordnance-grade 4140 chrome-moly steel and heat-treated for maximum core strength, the YHM-3102-1MB-24A is engineered to endure harsh unburnt propellant blast and extreme thermal cycling. The surface is treated in a matte black conversion finish that resists carbon adhesion, chemical bore solvents, and adverse environmental corrosion. When operated suppressed, the brake's dual side ports act as a sacrificial blast baffle, dispersing turbulent muzzle gases outward and significantly reducing erosion on the host suppressor's internal titanium or Inconel primary blast baffles.
Engineered for the competitive marksman and tactical professional alike, the Mini Phantom brake features coarse external ACME threads that prevent carbon lock, paired with rear ratchet teeth that deliver positive audible and tactile lockup against YHM's fast-attach locking collars. Its compact 1.245-inch outer diameter and ultra-short profile ensure your rifle maintains sleek handling characteristics without catching on gear or barricades. Every unit includes a precision stainless shim set, ensuring an armorer-grade timed installation right out of the packaging.
*Armorer Bench Notes & Real-World Staging Guidance:*
Fitment Matrix: Direct fit for barrels threaded 5/8"-24 UNEF (.308 Win, 7.62 NATO, .300 Blackout, 6.5 Creedmoor, 6.5 Grendel, 6.8 SPC). CRITICAL: DO NOT use with 9mm or calibers exceeding .30 caliber / .350" through-bore. INCOMPATIBLE with YHM sRx mount architecture. DO NOT install using a crush washer; suppressors demand perfect bore concentricity that only precision shims can provide. Recommended torque range is 20 to 30 ft-lbs with high-temperature threadlocker.
- Ensure the host firearm is completely clear, magazine removed, and chamber visually and physically verified empty before securing the barrel in an armorer barrel vise block or reaction rod.
- Thoroughly clean and degrease host barrel threads and brake internal threads using residue-free acetone or isopropyl alcohol, inspecting the barrel shoulder for a true 90-degree square surface.
- Perform a dry hand-tight test fit to check port orientation and determine the proper combination of included color-coded precision shims required to achieve flat horizontal timing at 12 o'clock.
- Apply 1-2 drops of high-temperature threadlocker (Rocksett recommended for suppressed use) to the barrel threads, install the selected shim stack, and torque the brake to between 20 and 30 ft-lbs using an armorers wrench.
- Insert a caliber-specific match-grade bore alignment rod down the bore with the suppressor mounted to visually verify concentricity before live-fire staging.
Key Features
- Ultra-Compact 1.6-Inch Footprint: Minimizes overall barrel extension and front-end mass while retaining effective dual-port muzzle brake recoil management.
- Phantom Q.D. Suppressor Interface: Utilizes coarse ACME threads and ratcheting rear lockup teeth to deliver carbon-resistant, rock-solid silencer attachment and detachment.
- Sacrificial Baffle Protection: Diverts aggressive gas erosion inside suppressor blast chambers, extending the operational service life of host sound suppressors.
- Hardened 4140 Chrome-Moly Construction: High-tensile ordnance alloy stands up to rapid-fire abuse, suppressor heat buildup, and heavy firing schedules.
- Included Precision Timing Shim Kit: Comes complete with an assortment of precision 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. Muzzle Brake
- MPN / SKU: YHM-3102-1MB-24A / 3102-1MB-24A
- UPC: 841812100812
- Thread Pitch: 5/8"-24 UNEF-2B
- Caliber / Through-Bore: .30 Caliber (.350" Diameter)
- Overall Length: 1.600"
- Outside Diameter: 1.245"
- Material: Heat-Treated 4140 Chrome-Moly Steel
- Finish: Black Oxide / Melonite
- Mount System: YHM Phantom® Fast-Attach Q.D.
- Platform Compatibility: AR-10, LR-308, .300 BLK AR-15, Bolt Action Rifles (5/8"-24)
- Installation Torque: 20 to 30 ft-lbs
- Country of Origin: USA
