Energetic Armament Sonus. 17-4 stainless steel (H900 condition). Weight: 9.8oz. Length: 6.6". Diameter: 1.54". 1.375x24 HUB/Bravo mount interface. Ships with 1/2-28 direct thread adapter (5/8-24 optional). Removable end cap with standard wipe holder — silicone wipe included for sub-sonic use. Rated for: 9mm NATO full auto, 300BLK sub and super, 8.6BLK subsonic only, 38/357 Mag, 350 Legend (10" barrel min). No barrel length restrictions under 1,000°F. Compatible with standard HUB 3-lug mounts and booster assemblies. 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