MPN: BRK4320

Features:

• Breek-LOK 3QD Compatible: Interfaces with the Breek-LOK 3QD system for fast, secure QD suppressor mounting
• Serious Flash Control: Gas-dispersing geometry plus internal threads reduce flash, protect night vision, and keep the sight picture clean
• Caged (Closed-Prong) Design: Eliminates snagging and the typical “tuning-fork” ring while boosting overall strength
• Low-Profile, Sleek Look: Streamlined shape that adds performance without bulk
• Hard-Use Construction: 4140 hardened steel with a nitride finish for wear, heat, and corrosion resistance
• Easy Install: Peel washer included for straightforward timing
• Made in the USA: Designed and manufactured in America for dependable quality

Specifications:

• Material: 4140 Hardened Steel
• Finish: Black Nitride
• Outer Diameter: 0.94"
• Bore Diameter: 0.38"
• Weight: 2 oz.
• Length: 2.25"
• Thread: 1/2x28 TPI

Compatibility:

• Any .223/5.56 Barrel with 1/2"-28 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:

The Breek-LOK 3QD Sentinel Caged Flash Hider is more than just a flash suppressor—it's a key part of the Breek-LOK 3QD quick-detach system. Designed to let you run suppressed or unsuppressed without swapping hardware, it offers fast, tool-free suppressor compatibility and real-world durability in one compact package.

Built for the Breek-LOK 3QD System

This flash hider is purpose-built to work seamlessly with Breek’s 3QD suppressor interface. A simple push-and-turn locks your suppressor in place, and the same motion removes it—no timing, no reconfiguration, no tools. Whether you're heading into a training day or switching hosts, you can mount or remove your can in seconds with repeatable alignment every time.

Caged Design with Practical Benefits

Open-prong flash hiders often reduce flash well—but they can ring, snag, or interfere with gear. The Sentinel addresses this with a caged design that surrounds the prongs, preventing hang-ups on slings, brush, or barricades. It still disrupts visible flash effectively, helping you maintain a clear sight picture in low light, without the downsides of exposed tines.

Durable Steel Construction, Minimal Footprint

Machined from 4140 hardened steel and finished with a QPQ nitride coating for corrosion and wear resistance, the Sentinel is built for high-volume use. At approximately 2.25 inches long and about 2 ounces, it keeps your barrel compact and balanced. It includes a peel washer to simplify installation and alignment.

A Simple, Reliable Flash Hider for Suppressor-Ready Builds

Designed for real use—not just range time—the Sentinel provides solid flash suppression and quick-detach compatibility in a rugged, snag-resistant form. If you're running a Breek-LOK 3QD suppressor setup and want clean lockup, low signature, and durable performance, this is a smart, streamlined solution made to keep up.