UTG Leapers SCP-DS3840TDQ Inc 4.2" ITA Red/Green T-Dot with QD Mount, Riser Adaptor Built on true strength platform to offer durability and precision adjustment; completely sealed, shockproof, Fogproof and rainproof Great field of view, unlimited Eye relief, and featuring a non-reflective Emerald coated lens Optimal height to co-witness with iron sights using included riser adaptor