The Sadlak Brookfield-type scope mounts are a positive 3-point design that allows removal and re-assembly without losing zero. The Picatinny-style rail is machined to Mil. Spec 1913 and provides universal scope mounting. The titanium mount is made from an aerospace-quality hot-forged billet (limited production), not from a casting or plate. It is tougher and stronger, yet weighs 40% less than steel. It has a 26-30 Hardness Rockwell C (HRc) and has been surface coated for a non-glare, matte-black finish. This coating increases the surface hardness to approximately 80 HRc, adding to its corrosive and abrasive resistance.The steel mounts is made from stress-relieved 4142 bar stock with a hardness of 28-32 Rc. The finish is Mil. Spec. black manganese phosphate. The aluminum mount is made to the same rugged 3-point contact design from 6061 heat treated aircraft aluminum. The standard finish is black hard-coat anodize. This model is lightweight and is a lower cost alternative that makes i...