Product Description The Breek Arms Sentinel is a closed-tine, fully shrouded (caged) flash hider designed for superior flash suppression while minimizing snagging on gear. Built for Plan B suppressor mounts and pin-and-weld builds, it offers rock-solid alignment in a compact package and delivers a night-vision-goggle-friendly signature reduction. Precision made from hardened steel with a black nitride finish, the Sentinel is optimized for .30 caliber applications with 5/8x24 muzzle threads. Product Highlights Closed-tine, fully shrouded design helps reduce flash and prevents snagging on equipment Plan B mount compatible for fast, secure suppressor-mount interface setups Black nitride finish on hardened steel for durability and corrosion resistance Compact 2.15-inch overall length supports pin-and-weld barrel builds Night-vision-goggle-friendly flash signature reduction for low-light use Specs Brand: Breek Arms Manufacturer Part Number: BRK4421 UPC: 812296031770 Type: Caged/closed-tine flash hider Caliber: .30 Caliber Muzzle Threads: 5/8x24 Material: 4140 hardened steel (nitride treated) Finish/Color: Black nitride Overall Length: 2.15 in Weight: 1.8 oz 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.