NcSTAR Offset Deployable Rear Sight Black. These AR 15 Parts from the pioneers at NcSTAR feature a foldable low profile design that won't obscure your vision or weigh down your rifle. With an A2 dual aperture the NcStar AR15 45-Degree Flip-Up Sight easily adjusts for windage in a moment's notice. Remain on target and on budget with the target acquiring NcStar AR15 45-Degree Folding Sight. Specifications for NcSTAR Offset Deployable Iron Sight: Manufacturer: NcSTAR Color: Black Deployable: Yes Gun Model: AR-15 Gun Make: AR Platform Gun Type: Rifle Sight Mounting Orientation: Offset Mount Type: Picatinny NcStar AR15 45-Degree Rear Sight NC-IRN-AR1545D 45 Degree offset folding Rear sight perfect for AR15 shooters looking for offset iron sights Fits onto receiver height Weaver Picatinny MIL-STD 1913 type rails The A2 Dual Aperature (Large & Small) Rear sight is fully adjustable for windage also with a Large windage knob Rear sight folds back flat for a lower profile and will fit under the majority of scopes out in the market Weight: 2.6 oz. Package Contents: NcStar AR15 45-Degree Offset Flip-Up Sight NC-IRN-AR1545D What firearm models does the manufacturer say NcSTAR Offset Deployable Iron Sight is compatible with? The manufacturer says that NcSTAR Offset Deployable Iron Sight is compatible with AR-15NcSTAR MAR45FLR: Offset Deployable Rear Sight Black