NcStar AR15 Flip Up Rear Sight (MARFLR)
- Precision made flip-up A2 rear sight. The MARFLR will fit virtually all AR-15, M4, and M16 flattop Picatinny rail upper receivers.
- A2 rear sight assembly with large and small rear aperture. A2 rear sight is fully adjustable for windage with knurled click adjustable controls
- Large steel thumb nut and precise rail clamp for positive & secure attachment to your upper receiver
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