The Rimfire Rifle Front Sight is a replacement for existing front sights. It is extremely bright in low-light conditions and is CNC-machined. The sight has a fiber diameter of 0.060" and a height of 0.400". Not suited for Marlin hood footprint sight models. Not suited for Ruger tapered barrel designs or 22/45 LITE models. Does not fit BuckMark contour models.