Saevus Urban Bayonet Vertical Grip Posted May 29, 2014 in AR-15, Guns & Gear, Other Gear & Gadgets by Nicholas C with 21 CommentsTags: knife, Vertical Grip Saevus has an interesting concept. In the same vein as the Survival Grips, the Urban Bayonet is a vertical grip that can detach and become a weapon. In this case, it is a knife. No word on price or ETA. But check out Saevus for ore info.