The invention is a device for supporting a firearm. The device comprises a body, a gripping arrangement, a fixing arrangement for the gripping arrangement and a holding arrangement for fixing the body onto the scope rail of the firearm. The body has an upper surface and a bottom surface and a first side and a second side, and on the bottom surface is a rail channel. The walls of the rail channel are configured in such a way that at least part of the scope rail can be fitted into the rail channel, and the fixing arrangement for the gripping arrangement is configured to fix the gripping arrangement into a first position where the gripping arrangement extend from the first side of the body. The first end of the gripping arrangement is configured to grip a surface when supporting the firearm.