Plan B Sentinel Closed Flash Hider | 30 cal | 5/8x24 Thread

Stand guard against muzzle flash with the Plan B Sentinel, Breek Arms’ compact caged flash hider purpose-built for shooters running a Plan B-threaded suppressor setup—and for builders who need a rock-solid pin-and-weld solution to reach legal barrel length. Match it with our Hub One universal suppressor hub (or any Plan B-spec mount) for lightning-fast attachment, minimal added length, and flawless bore alignment. A fully shrouded, closed-tine profile funnels unburnt gases forward, crushing visible flash without the notorious tuning-fork ping. Internal gas-catcher threads create turbulence that outperforms conventional flash hiders, preserving night-vision clarity in low-light missions. The enclosed cage eliminates snag points, adds structural strength, and keeps the device compact under handguards or inside suppressor bores. A generous shoulder and solid wall thickness make the Sentinel ideal for pin-and-weld configurations, allowing 14.5″ and similar barrels to be permanently extended to 16″ OAL while maintaining suppressor compatibility.

Specifications:

• Design: Sentinel
• Material: 4140 Hardened Steel, Nitride
• Overall length: 2.15 Inches
• Weight: 1.8 oz 
• Outside Diameter: 1 inch
• Peel Washer Included
• Designed & Manufactured in America