The Method Dynamics Flash Drive Cage Flash Hider is a muzzle component designed for firearms with a 5/8-24 thread pitch. Manufactured from stainless steel with a heat-treated finish, this device is built for durability and heat resistance. Its cage-style architecture is engineered to facilitate gas dispersion and is specifically designed for compatibility with Plan B mounting systems. The unit features 13/16" wrench flats to assist in standard installation procedures on compatible threaded barrels. Product Features Includes : A shim kit for proper timing and alignment during installation. Product Specifications Brand : Method Dynamics Model : Plan B Flash Drive Cage Flash Hider Caliber : Primarily designed for .30 caliber (7.62mm) projectiles, though its over-bored design (typically .375") allows for use with smaller calibers like .223/5.56mm and 6.5mm. Type : Caged flash hider and suppressor mount Muzzle Thread : 5/8"-24 TPI Material : Aerospace-grade 17-4 PH H900 Stainless Steel. Finish : Heat Treat , resulting in a natural straw-to-bronze coloration from the hardening process. Length : Approximately 2.0 to 2.2 inches Width : Approximately 0.850" to 0.900" at the widest point for adapter interface. Weight : Estimated between 2.3 and 2.8 oz based on similar 17-4 stainless steel 5/8x24 mounts.