An assembly for facilitating the insertion of a fresh magazine into a magazine receiver opening of a pistol having a handle frame member to which a pair of opposing hand grips are removably attachable. The magazine insertion guide is secured in position on the butt portion of the frame member by engagement of a plurality projecting securing members that are concealed by, and cooperatively engage interior elements of specially configured hand grips when the grips are attached to the frame member, the exterior surfaces of which mimic the original equipment grips.