We've been hemming and hawing over a vertical grip for some time, going from full billet designs, to tubular types with end caps and adjustable angles. Unfortunately stuff like that comes at a high cost in terms of machine time and increased component count. The two prototypes shown below are for the CMR and KeyMod interfaces, and focus on the other end of the spectrum: keeping it light, less expensive, and very streamlined.

We are planning on having some tiny v-grooves on the three flat bands between the contours to give a little more texture and grip, but these aren't present on the prototypes. The top shape is concave where it curves in to meet the handguard. The reason for this is that it feels very comfortable in your hands, providing a natural place for your top-most finger or thumb, depending on how you hold it. We also wanted to avoid having it flare at the top, like most picatinny vertical grips do.

Outer diameter is 1.3", and overall length is 2.5." Weight is about 1.6 oz. It's hollow, with no end cap at the moment. Cut from 6061 aluminum, of course.

Oh, and most importantly, it uses two mounting screws/KeyMod nuts/M-Lok nuts, so it's rock solid.

Anyway, here are the pictures, and feel free to leave some feedback.