CYMA M4 S-System Style Flip-Up Rear Sight for 20mm 1913 Picatinny RailCYMA M4 S System Style Flip Up Rear Sight for 20mm 1913 Picatinny Rail. Made out of metal. Flip Up Design. Sight is held in the locked down position by a quick release lever. Initial elevation zero utilizes the stand M Series front sight bead. 300 meter selection in just a flip. Suitable for 20mm 1913 Picatinny Rail. Color Black Weight Approx 85g Original Packing
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