MPN: BRK4321

Features:

• QD-Ready: Built to interface with the Breek-LOK 3QD system for fast, secure attach/detach
• Low-Light Advantage: Gas-disrupting geometry and internal threading cut flash to protect night vision and keep sights clear
• Caged, Snag-Free: Closed-prong design prevents catching on gear and eliminates the prong “ring”
• Slim, Strong, Clean: Low-profile form that adds strength without bulk
• Hard-Use Build: 4140 hardened steel with a nitride finish for heat, wear, and corrosion resistance
• Light & Compact: 2.25" OAL and weighs only 1.8 oz. keeps weight off the muzzle
• Easy Timing: Peel washer included for straightforward installation
• USA Made: Designed and manufactured in America

Specifications:

• Material: 4140 Hardened Steel
• Finish: Black Nitride
• Outer Diameter: 0.94"
• Bore Diameter: 0.38"
• Weight: 1.8 oz.
• Length: 2.25"
• Thread: 5/8x24 TPI

Compatibility:

• Any .308/7.62/300BLK Barrel with 5/8"-24 thread pitch
• Breek-LOK 3QD HUB Quick Detach Suppressor Mount

NOTE: Installation will require a Breek-LOK Installation Tool or a strap wrench

Includes:

• 1x Breek Arms Breek-LOK 3QD Sentinel Caged Flash Hider
• 1x Peel Washer

Details:

If you’re running a .30-caliber rifle within the Breek-LOK 3QD ecosystem, the Sentinel Caged Flash Hider is purpose-built to be your go-to muzzle device. Designed for seamless compatibility with Breek’s 3QD suppressor mounting system, it lets you switch between suppressed and unsuppressed setups in seconds—no re-timing, no extra hardware, and no interruptions to your workflow.

Flash Suppression Without the Ring

Traditional open-prong flash hiders are effective but come with tradeoffs—namely ringing after shots and snagging on gear or brush. The Sentinel avoids those issues with an enclosed, caged design that still breaks up muzzle flash but eliminates the “tuning-fork” effect. The result is a cleaner, quieter shooting experience with improved visibility in low-light conditions.

Sized Right for Practical Builds

This .30-cal version is threaded for 5/8×24 barrels and keeps a low profile at approximately 2.25 inches in overall length. Weighing around 1.8 ounces, it’s light enough to preserve your rifle’s natural balance and gas behavior—especially important when mounting and unmounting a suppressor throughout the day.

Built to Endure, Easy to Install

Made from 4140 steel and finished with a black nitride coating, the Sentinel resists heat, corrosion, and carbon fouling. A peel washer is included for easy timing and installation. Once in place, it becomes a solid host for your suppressor—delivering repeatable alignment with each use, thanks to its integration with the Breek-LOK 3QD system.

Ready for Field Use, Not Just the Range

Whether you're running bare for a reduced signature or locking on your can for a suppressed setup, the Sentinel makes the transition seamless. It's built for shooters who value reliability, simplicity, and low-maintenance performance in real-world conditions.

Equip your .30-cal rifle with the Breek Arms Sentinel Caged Flash Hider and get fast suppressor compatibility with effective flash reduction—without complicating your setup.