The Breek Arms Sentinel Caged Flash Hider (MPN BRK4320) is a .223 Rem/5.56 NATO caged flash hider threaded 1/2-28 that mounts to the Breek-LOK 3QD quick-detach hub system.

Key Specifications

• Bore sized for .223 Rem/5.56 NATO
• Thread pattern: 1/2-28
• Caged-hider design shrouds the flash-suppressing tines
• Interfaces with the Breek-LOK 3QD HUB’s tri-lug engagement system for quick-detach suppressor mounting
• Part of the Breek LOK 3QD muzzle device family
• Manufactured by Breek Arms

Frequently Asked Questions

Is this flash hider an NFA item?
No. It is a muzzle device and suppressor-mounting interface; only a suppressor attached through the Breek-LOK system is a regulated Title II item.

What does the ‘caged’ design do?
It shrouds the prongs so they are less likely to snag on gear compared to an open 3-prong design.

How does it mount a suppressor?
It pairs with the Breek-LOK 3QD HUB, which uses a tri-lug engagement system for fast, repeatable suppressor attachment.

Buy the Breek Arms Sentinel Caged Flash Hider

Shroud your flash signature and set up quick-detach suppressor mounting with this Sentinel hider from Breek Arms. Ships fast from Lubbock, TX in our Class 3 parts and accessories lineup.