The Bravo Company USA BCM Vertigal Grip evolves even further, taking the opportunity of the rail systems in the market. The first one is the BCM Vertical Grip Mod 3 – KM designed to be used in the Open Source KeyMod rail systems, which you see in new rifles with a slim and low profile look. The second one is the the BCM Vertical Grip Mod 3 – 1913 which is made for the new Direct Mount Picatinny 1913 Interface System.