The Sons of Liberty Gun Works NOX Flash Hider – .223 Remington / 5.56 NATO, Black Nitride, 1/2x28, Dead Air KeyMount Compatible, 9 Ports, Includes Timing Shims (NOX9-556 / NOX9556, UPC 785939519396) is a premium hybrid muzzle device built for shooters who demand top-tier performance, rugged durability, and suppressor-ready versatility. Designed by Sons of Liberty Gun Works (SOLGW), the NOX blends the functions of a flash hider and compensator while serving as a rock-solid mounting interface for Dead Air Armament suppressors and KeyMount accessories. weaponoutfitters.com+3palmettostatearmory.com+3GunMag Warehouse+3
Hybrid Flash Hider / Compensator for 5.56 and .223
The NOX is engineered as a hybrid muzzle device that delivers effective flash reduction while also helping to control muzzle rise and recoil:
Flash Hider Performance: Three-prong design helps break up and disperse muzzle flash for improved low-light shooting and reduced visual signature. Primary Arms+1
Compensator Function: Multiple gas ports are strategically positioned to vent gases and assist in keeping the muzzle flatter during rapid strings of fire. Primary Arms+2AR15Discounts+2
Caliber-Specific Tuning: Optimized for .223 Remington / 5.56 NATO rifles, particularly AR-15 pattern platforms using a 1/2x28 thread pitch. OpticsPlanet+1
This means you get a balanced, controllable muzzle device that helps you stay on target in fast-paced carbine classes, competition stages, or defensive roles—without the excessive blast and concussion of many traditional brakes. performancetriggers.com+1
9-Port Neutral Design for Ambidextrous Control
The Sons of Liberty NOX9-556 uses a 9-port “neutral configuration” layout that works equally well for right- and left-handed shooters: Big Tex Ordnance+3OpticsPlanet+3Primary Arms+3
Nine gas ports arranged to provide non-biased compensation, reducing muzzle climb without favoring one side. Primary Arms+2Rooftop Defense+2
Ports located primarily at the 12, 3, and 9 o’clock positions to stabilize the rifle under recoil. palmettostatearmory.com+2AR15Discounts+2
Neutral timing makes it an excellent choice for shooters who might change setups or share rifles between left- and right-handed users. Primary Arms+1
This neutral configuration is especially appealing if you’re looking for a do-everything 5.56 muzzle device that doesn’t require a specialized configuration for your shooting side or style.
Dead Air Suppressor & KeyMount Compatible
A standout feature of the NOX is its integrated KeyMount interface, which lets it work as both a flash hider/compensator and a suppressor mount:
If you’re planning to suppress your rifle, the NOX serves as a dual-purpose solution: a high-performance muzzle device when unsuppressed, and a rock-solid mounting platform when you attach your Dead Air can. performancetriggers.com+2GunMag Warehouse+2
Rugged 4140 Steel with Black Nitride / QPQ Finish
Sons of Liberty Gun Works builds the NOX to withstand hard use and adverse conditions:
Material: Precision machined from 4140 chrome-moly steel for strength and durability. OpticsPlanet+1
Finish: Treated with a QPQ / nitride finish for increased surface hardness, wear resistance, and corrosion protection in harsh environments. Big Tex Ordnance+1
Color: Classic matte black appearance that matches most modern AR-15 and 5.56 rifle builds. OpticsPlanet+1
American Made: Manufactured in the USA to SOLGW’s demanding standards. badlandsmunitionsco.com+1
The result is a muzzle device you can install and run hard in training, duty, or competition with confidence that it’s built to last.
Includes Timing Shims for Proper Installation
To help ensure a clean, professional installation, the NOX includes timing shims out of the box: Shooting Surplus+2Frisco Guns+2
Whether your rifle is a factory gun or a custom build, having shims included means less hunting for extra parts and more time getting your rifle dialed in.
(Always have muzzle devices installed by a qualified professional if you are unsure about the process.)
Ideal Use Cases for the NOX Flash Hider
The Sons of Liberty Gun Works NOX .223/5.56 Flash Hider is an outstanding choice for:
AR-15 home defense builds where reduced flash and quick follow-up shots matter. Primary Arms+1
Duty or patrol rifles that may be used in low-light environments and later upgraded with a Dead Air suppressor. performancetriggers.com+1
3-Gun and practical competition rifles needing a balance between recoil control and reduced concussion. Primary Arms+1
13.7" or similar carbine builds where a permanently attached NOX can help reach legal overall length while adding KeyMount compatibility. AT3 Tactical+1
If you’re aiming for one muzzle device that checks all the boxes—flash suppression, compensation, suppressor interface, durability, and American-made quality—the NOX belongs on your shortlist.
Key Features & Specifications – SOLGW NOX9-556 / NOX9556
Product Name: Sons of Liberty Gun Works NOX Flash Hider
Model Numbers: NOX9-556 (9-hole neutral version), NOX9556 (QD KeyMount configuration as marketed by many retailers) badlandsmunitionsco.com+3Shooting Surplus+3OpticsPlanet+3
UPC: 785939519396 OpticsPlanet
Technical Specs
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