Mantis Barrel Mount Picatinny Rail 15-24mm Universal BR7

The BR7 mount Creates a standard 1913 picatinny rail system on bull barrel long guns

Included in the BR7 kit are four different size spacers

Fits on all round barrel type firearms; Ideally suited for 12, 16, 20, 28 gauge shotguns and all kinds of rifles, with an outer diameter of 15-24 mm