Holosun Technologies 507C, Red Dot, 2 MOA Dot & 32MOA Ring, Multi-Reticle System (Dot, Ring, Both), Black Finish, 7075 T6 Aluminum, Multicoated Lens, V2 Optics System, Shake Awake Technology, Side Battery, Solar Failsafe, Picatinny Rail mount. The Holsun HS507C V2 uses a Trijicon RMR mount pattern.