Only fits standard picatinny - make sure it fits your rail style - NcSTAR Vertical Grip for Picatinny and Weaver Type Rails

I returned this grip because it did not fit the Contessa style picatinny rail on my firearm. The way that this grip secures itself is: the bottom screws into place pushing a plastic button into the gap between the crossbars of the picatinny rail. My picatinny rail has a groove that runs down the middle of the rail and the little plastic button has nothing to secure itself between. Look at something like the Mission First grip that has a bar that spans the entire gap between the crossbars of the rail.