JMac Customs GFH KeyMount Flash Hider - M14x1 LH

JMac Customs GFH KeyMount Flash Hider - M14x1 LH

Engineered with inspiration drawn from the legendary Heckler & Koch G36 flash hider, the JMac Customs™ GFH/GFHC delivers a refined balance of performance, durability, and suppressor-ready versatility. Built for shooters who demand cleaner sight pictures, reduced muzzle flash, and improved muzzle control, this flash hider transforms your rifle into a more stable, predictable, and mission-ready platform.

Precision-machined from ultra-durable 17-4PH stainless steel and finished in a rugged QPQ black nitride coating, this muzzle device is built to withstand extreme heat, erosion, and corrosion without compromise. Whether you’re training hard, competing, or configuring a duty-ready build, the GFH/GFHC is designed to perform under pressure while maintaining long-term reliability.

Compatible with KeyMount® and KeyMicro® systems, this muzzle device also supports select OEM pin-and-weld configurations, making it a go-to choice for 13.7” and 14.5” 5.56/5.45 builds. With its evenly cut, non-timed slot design, installation is streamlined while ensuring consistent gas dispersion and reduced muzzle rise.

G36-Inspired Flash Reduction Design
Modeled after the proven Heckler & Koch G36 platform to minimize visible muzzle flash and improve low-light shooting performance.

Even Gas Dispersion Slot Geometry
Precision-cut, symmetrical ports distribute gas evenly in all directions for reduced muzzle rise and smoother recoil control.

KeyMount® & KeyMicro® Suppressor Compatibility
Fully compatible with Dead Air KeyMount® and KeyMicro® suppressor systems for seamless suppressor integration.

Pin & Weld Ready Configuration
Pre-drilled hole supports secure pin-and-weld installations, ideal for compliant 13.7” and 14.5” rifle builds.

No Timing Required Installation
Shoulder-mounted design eliminates the need for timing adjustments, simplifying setup and reducing installation complexity.

Premium 17-4PH Stainless Construction
High-strength, erosion-resistant material ensures long-term durability under extreme heat and high round counts.

QPQ Black Nitride Finish Protection
Advanced surface treatment enhances corrosion resistance while providing a sleek, low-glare tactical finish.

Specifications

• Material: 17-4 PH Stainless Steel
• Finish: QPQ Black Nitride
• Device Type: Flash Hider
• Mount Compatibility: KeyMicro / KeyMount®
• Thread Pitch: 1/2-28 (GFH-28S-KM)
• Caliber Compatibility: .223 / 5.56 NATO (AR-15 platforms)
• Bore Diameter: 9mm
• Weight: 4.4 oz
• Barrel Length Restriction: None
• Timing Requirement: No timing required (shoulder or face mount depending on setup)
• Mounting Style: Shoulder | Face mount compatible
• Installation Method: Pre-drilled hole for pin/weld applications
• Torque Recommendation: 30–40 ft/lbs