NcSTAR NC Star MRUB1022V2, Ruger 10/22 Mount, Black/Gen 2 Ruger 10/22 receiver Picatinny/MIL-STD 1913 rail, sleek new design Mounts onto the top of the 10/22 receiver utilizing the pre-drilled holes on the receiver Centerline sight channel Machined into the rail, so that you can still Use the factory iron sights with the rail mounted onto the receiver