This robust silencer from AAC is engineered for the toughest usage and conditions. With a serviceable front end cap, full-auto compatibility, and an included 1.375-24 mount, the versatile Ranger Series is focused on reliable performance. RANGER 7 is not Key-Mo compatible, but works with Rearden Mfg Atlas mounts (Helios QD mount SKU 10089 Nitride or 10090 HT for a quick taper solution). 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