This vented rib mount adapter is designed for use with vented shotgun ribs (no wider than 7.9mm). The length of the Picatinny rail is 85mm and is long enough to fit most scopes and accessories.
No gun build is required to install the Rib-Mounted Picatinny Rail. You can take it out of the box and install it on your gun in minutes. These rails mount as low as possible on the ribs for a slim profile that minimally affects the build of your gun. The mounting principle consists of transverse slats, which are passed through the holes in the ventilated plate and tightened with two screws. On the sides of the transition bar are 2 pins that provide additional fixation.