Yankee Hill Machine (YHM) .30 Cal Q.D. Muzzle Brake – 1/2"-28 – YHM-4302-MB-28A
The YHM-4302-MB-28A is a specialized 2026-spec muzzle device designed for shooters who need a 1/2"-28 thread pitch for a .30 caliber bore. While most .30 caliber barrels use 5/8"-24 threads, this specific model allows owners of smaller-threaded barrels (often found on 5.56 rifles re-barreled to .300 Blackout or certain 7.62x39 platforms) to utilize YHM’s legendary Phantom® Q.D. system. This three-chamber muzzle brake is engineered to significantly reduce felt recoil and muzzle climb, providing a stable platform for rapid follow-up shots. Its design intentionally omits downward-facing ports, which eliminates the "dust signature" when shooting from a prone position—a critical feature for tactical and long-range precision shooters.
As a foundational component of the YHM sound suppression ecosystem, the YHM-4302-MB-28A serves as a rock-solid mounting point for the Resonator® R2, Resonator® K, and Nitro® .30 suppressors. Machined from heat-treated 4140 steel and finished in a durable black oxide, it is built to withstand the extreme temperatures and pressures of suppressed fire. The "smooth-bore" redesign for 2026 eases the cleaning process, preventing carbon buildup from seizing the suppressor to the mount. With an included shim kit for precise timing and a weight of just under 4 ounces, this muzzle brake is the professional’s choice for maximizing the performance of 1/2"-28 threaded .30 cal host firearms.
Includes: (1) YHM .30 Cal Q.D. Muzzle Brake and (1) Stainless Steel Shim Kit for installation.
Key Features
- Phantom® Q.D. Interface: Provides a fast, secure, and repeatable mounting solution for all YHM .30 caliber sound suppressors.
- 1/2"-28 Thread for .30 Cal: A rare and essential configuration for .30 cal barrels with 1/2"-28 threads (common in .300 BLK or 7.62x39 conversions).
- Three-Chamber Design: Maximizes recoil mitigation and muzzle control for improved shooter comfort and accuracy.
- Prone-Optimized Ports: No downward-facing vents ensures you don't kick up dirt or debris when shooting from the ground.
- 4140 Steel Construction: Heat-treated for maximum longevity, specifically designed to act as a "sacrificial baffle" to protect your suppressor's internals.
- Made in the USA: Produced in Florence, Massachusetts, with the high-grade craftsmanship YHM has provided for generations.
Product Specifications
- Brand: Yankee Hill Machine (YHM)
- Model: .30 Cal Q.D. Muzzle Brake
- SKU: YHM-4302-MB-28A
- Thread Pitch: 1/2"-28
- Bore Diameter: .30 Caliber
- Material: Heat-Treated 4140 Steel
- Finish: Matte Black Oxide
- Length: 2.418 Inches
- Weight: 3.96 oz
- UPC: 816701018530
