This Optic Adapter Plate supports the use of Burris® FastFire™ and Vortex® Viper®/Venom® red dot sights on the Ruger-57 pistol. The plate is precision CNC machined from 6061-T6 aircraft aluminum with a matte black hardcoat finish for strength and durability. Simply place the adapter plate onto slide and secure it using the two #6-32 screws provided. Tighten the screws firmly (30-50 in-lbs.) using a Torx® T-15 wrench (not included). Install the optic onto the Adapter Plate by following the sight manufacturer's mounting specifications (sight not included). The Adapter Plate is 1.700'' long x .975'' wide and weighs .2 ounces. This Genuine Ruger Factory Accessory is made in the USA.
