Breek Arms Sentinel Caged Plan B Features The Breek Arms Sentinel Caged is a closed tine fully shrouded flash hider design built for superior flash suppression while reducing the risk of snagging on gear in the field. Machined from 4140 hardened steel and nitride finished it offers a durable corrosion resistant exterior built to withstand repeated firing cycles. Its fast attach design is built for Plan B suppressor mounts giving shooters rock solid alignment and a compact footprint when a suppressor is attached. The included peel washer helps achieve proper indexing and alignment during installation. At 2.15 inches overall length and just 2.2 ounces the Sentinel keeps a minimal footprint on the muzzle end of a rifle while still delivering its shrouded flash suppression benefits. Its NVG friendly signature reduction makes it well suited to shooters running night vision equipment who need to minimize visible flash during low light engagements. The 1/2x28 thread pattern is engineered to be pinned and welded on 14.5 inch barrels to meet the 16 inch federal minimum length requirement giving builders a compliant path to a shorter barrel configuration. Shooters building a suppressor ready pin and weld compliant AR-15 will find the Sentinel a purpose built solution. Breek Arms Sentinel Caged Plan B Specifications Manufacturer: Breek Arms Model: Sentinel Caged Plan B Type: Flash Hider Caliber: .223 Rem / 5.56 NATO Color: Black Material: 4140 Hardened Steel Finish: Nitride Length: 2.15 Thread Pattern: 1/2x28 Includes: Peel Washer Weight: 2.2 oz Barrel Length: 16 Available At: GrabAGun