Energetic Armament Ferox. 17-4 stainless steel (H900 condition). Weight: 12.5oz. Optimized for 5.56mm platforms, particularly short and mid-length barrels. Low back pressure design with radial gas bleed-off chambers. 1.375x24 HUB/Bravo mount interface. Ships with 1/2-28 direct thread adapter. Removable flash hider end cap with functional tines. Patented Serial ID ring for streamlined warranty service. Includes wrench multi-tool, VOX Blox vise block, and anti-seize. Note: If this product is reflected as in-stock it means it's either physically in-stock or allocated and available (serial number is assigned) at my distributor