NC Star AR15 45-Degree Offset Flip-Up Rear Sight is new for 2014! MAR45FLR fits onto receiver height Weaver, Picatinny, MIL-STD 1913 type rails. 45 Degree offset folding Rear sight perfect for AR15 shooters looking for offset iron sights. Rear sight folds back flat for a lower profile and will fit under the majority of scopes out in the market.Specifications:Brand: NcSTARColor: BlackFinish: Hardcoat AnodizedFixed Folding: FoldingIlluminated: Non-IlluminatedManufacturer: NCStarMaterial: AluminumPlatform: AR-15/AR-308Position: FrontWeight: 2.4 Oz