The GG&G one 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