A firearm support for a firearm includes: a body, which is provided with at least one profile on its surface; a feeler pin, for striking against the profile and for being coupled to the firearm so as to follow the movement of said firearm; a support element, rotatable around a first axis (z-z) relative to the body. The support element is suited to be coupled to the firearm, thus allowing mutual rotation between the support element and the firearm around a second axis (x-x).