Breek Arms' lineup of Outside Threaded Muzzle Devices is an affordable upgrade that gives you the option to run a flash hider or muzzle brake while utilizing the Breek Arms Castle Blast Shield as a forward blast diverter or concussion device. Simply slide the blast shield over the outside of the muzzle device and turn the blast shield on. This gives the shooter a more pleasant experience when firing especially for shorter platforms that tend to have an overbearing concussion. This caged style flash hider has added retention on the tines to ensure durability. FEATURES: Rated for 10.5" barrels and up. Internal Threads Disrupt Gas Expansion Resulting in Less Fla Mfg: Breek Arms