Product Description The Breek Arms Sentinel is a closed-tine, fully shrouded (caged) flash hider designed to deliver superior flash suppression while reducing snagging on gear. Precision-machined from hardened steel with a durable black nitride finish, it is built for use with Plan B-style mounts (including Atlas interfaces) and is well-suited for compact, repeatable alignment in demanding use. The Sentinel is also engineered with pin-and-weld builds in mind, helping achieve a consistent, NVG-friendly signature while maintaining reliable performance. Product Highlights Closed-tine, fully shrouded "caged" design helps reduce snagging and improves flash suppression. Plan B compatible flash hider for solid alignment and repeatable engagement. Black nitride finish for long service life and corrosion resistance. Precision-machined hardened steel construction for durability under hard use. Includes peel washer to aid consistent seating during installation. Specs Brand: Breek Arms Manufacturer Part Number: BRK4420 UPC: 812296031763 Type: Flash Hider (Caged / Closed-Tine) Series / Mount Pattern: Plan B (Atlas interface compatible) Caliber Compatibility: .223 Rem / 5.56mm Thread Pitch: 1/2x28 Material: 4140 hardened steel Finish / Color: Black Nitride Overall Length: 2.15 in Weight: 2.2 oz Included: Peel washer Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&&';;s manufacturer.