The SRD762 is an Inconel 718 direct thread suppressor. Inconel 718, a nickel alloy stainless steel, provides the highest level of durability, particularly with short-barreled hosts using supersonic ammunition. The 5/8-24tpi threads match the vast majority of modern sporting rifles in .308/762/300BLK on the market today. The rear mount has wrench flats to torque the suppressor to the barrel. These wrench flats can be used as a location to pin and weld the suppressor to make a shorter barrel over 16 in total length.Æ’Æ’The SRD762 is rated up to 300 Win Mag and any other rifle cartridges that are of equal or less projectile diameter, pressure and case capacity. Examples of this would be .204 Ruger, .223/5.56x45mm, 5.45x39mm, 7.62x39mm, 300BLK, 6.5 Grendel, 6.5 Creedmoor, 6.8 Spc, .260 Remington and other cartridges. Requires a Class 3/SOT for purchase