This ported 5.5" muzzle brake/flash hider is perfect if you want to add some length to a short barreled rifle project or are looking for a different look for your AR-10. It is a machined, ported muzzle brake finished in black oxide. It is threaded 5/8x24 for standard AR-10 threads. It can be pinned and welded for compliance as well. Weighs about 7 ounces.