The Arisaka Offset Optic Mounting Base allows you to attach micro red dots to your rifle at either a 45deg or 35deg position to use in conjunction with your primary scope. This base by itself is machined from 6061-T6 aluminum and hardcoat anodized for durability. It is designed to attach directly to picatinny rails and is low profile enough to fit underneath most scope bodies allowing you to place it at your preferred position. The mount and plates can be reversed for left side use. The plates are sold separately and come in multiple different styles to fit your favorite red dot sight. When the rifle is canted, this mount keeps the red dot centered over bore and maintains a lower 1/3rd co-witness height.Features: Centered over bore Lower 1/3rd co-witness height Adjustable between 35deg and 45deg Machined from 6061-T6 aluminum Hardcoat anodized Occupies three slots Weight: 1.9 oz.Arisaka LLC is a design and manufacturing company owned and run by shooting enthusiast and adamant 2nd amendment advocates. Arisaka Defense believes in creating no compromise products that make the accessories on your weapon system more ergonomic and usable. They offer a variety of light mounts to be compatible with every possible configuration. Each part is machined to precise tolerances and made with care to ensure a proper fit and elegant finish.