Hogue Polymer Grip, Fits Blackhawk/Vaquero, Cowboy Panels, White Pearl 79070 These Hogue Cowboy Action grips will fit Ruger Flat-Top Blackhawk" New Vaquero and SAS Vaquero models. These models are sometimes referred to as having XR3 grip frames. These frames will have a width of approximately 7/16" on the backstrap. These Cowboy Action grips will fit models with or without the internal locking mechanisms.