Z1R Jackal Helmet Z1R Jackal Helmet from Brian Holvenstot Z1R Jackal Helmet Z1R - Jackal helmet design including shell, shield mechanism, and graphics. View PDF View PDF gLike Z1R Jackal Helmet Z1R - Jackal helmet design including shell, shield mechanism, and graphics. 3D Modeling Industrial Design Product Design Share R 7 n Brian Holvenstot Industrial Designer Portland, OR Follow Contact