The Breek Arms Sentinel Caged Flash Hider (MPN BRK4323) is a 9mm caged flash hider threaded 1/2-28 that mounts to the Breek-LOK 3QD quick-detach hub system.

Key Specifications

• Bore sized for 9mm
• 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 thread pitch does it use?
1/2-28, sized for 9mm pistol-caliber carbines using this thread standard.

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

Set up your 9mm carbine for quick-detach suppressor mounting with this Sentinel hider from Breek Arms. Ships fast from Lubbock, TX in our Class 3 parts and accessories lineup.