The Mossberg 940 Pro Tactical Professional Series autoloader is joining the ranks and delivers with its quality, endurance, and performance-driven features.The Holosun HS407K X2 is an open reflex optical sight designed for subcompact pistol applications. The HS407K X2 improves on the previous version by adding Lock Mode which was first introduced on 2018 LEM pistol optic models. Lock Mode, when activated, locks the buttons preventing inadvertent setting changes. FeaturesHolosun 407K InstalledOptics Ready (RMSc Footprint)Optic Adapter Plates (RMR, Docter, Leupold)Integral HeatshieldAdjustable Length of PullDrilled and TappedBarrel Clamp with M-Lok Slots