The Arisaka Offset Optic Mount 8 RMR Tall is a modular mounting solution designed to position a red dot sight at an offset angle on your AR15's top rail, giving you a secondary aiming point without cluttering your primary optic. This Arisaka Defense mount lets you run a full-size scope and a red dot simultaneously—a setup that's become standard for hunters and tactical shooters who want both long-range precision and fast close-quarters capability. The tall profile (1.9" to 2.2" scope mount height) works with the included Plate 8, which is cut specifically for Trijicon RMR, SRO, Holosun 407C, 507C, and 508T red dots.

What sets this mount apart is its flexibility. You get to choose between a 35-degree or 45-degree offset position—no extra parts required. The 35-degree angle tucks your red dot closer to slimmer scopes, while the 45-degree option gives you clearance around larger turrets and higher-magnification glass. When you cant your rifle to use the offset sight, the optic stays centered over the bore and maintains a lower 1/3 co-witness height, so your sight picture stays true. The base and optic plates are reversible, so you can run this on your left or right side depending on your setup or preference.

Built from 6061-T6 aluminum with hard-coat anodizing, the Arisaka mount is tough enough for professional use and field reliability. At just 1.9 ounces, it won't bog down your rifle, and it occupies only three Picatinny slots on your rail. The modular design means you can buy the base and plates separately, so you can upgrade to new red dots over time without replacing the whole system.

The Arisaka Offset Optic Mount 8 RMR Tall is a modular mounting solution designed to position a red dot sight at an offset angle on your AR15's top rail, giving you a secondary aiming point without cluttering your primary optic. This Arisaka Defense mount lets you run a full-size scope and a red dot simultaneously—a setup that's become standard for hunters and tactical shooters who want both long-range precision and fast close-quarters capability. The tall profile (1.9" to 2.2" scope mount height) works with the included Plate 8, which is cut specifically for Trijicon RMR, SRO, Holosun 407C, 507C, and 508T red dots.

What sets this mount apart is its flexibility. You get to choose between a 35-degree or 45-degree offset position—no extra parts required. The 35-degree angle tucks your red dot closer to slimmer scopes, while the 45-degree option gives you clearance around larger turrets and higher-magnification glass. When you cant your rifle to use the offset sight, the optic stays centered over the bore and maintains a lower 1/3 co-witness height, so your sight picture stays true. The base and optic plates are reversible, so you can run this on your left or right side depending on your setup or preference.

Built from 6061-T6 aluminum with hard-coat anodizing, the Arisaka mount is tough enough for professional use and field reliability. At just 1.9 ounces, it won't bog down your rifle, and it occupies only three Picatinny slots on your rail. The modular design means you can buy the base and plates separately, so you can upgrade to new red dots over time without replacing the whole system.