The GG&G 1-piece Mossberg 930 Receiver Scope Mount provides an easy way to mount a tactical scope to the factory drilled and tapped receiver of your Mossberg 930 shotgun. Easy installation to factory drilled and tapped receivers or receivers drilled and tapped for 8-40 threads. Features: Low profile design Precision machined from 6061 T6 billet aluminum All edges are smoothed and rounded MIL-STD 1913 configuration