The Arisaka Offset Optic Mount Base (brand part no. OOM-BASE) is a patented, modular mounting solution that lets shooters select either a 35-degree or 45-degree offset position for their red dot sight without swapping any additional components. Arisaka Defense engineered the mount so the 35-degree position brings the red dot up closer to slimmer, smaller scopes, while the 45-degree position provides additional clearance around wider magnified optic turrets. Reversing the stem between the optic plate and base during assembly switches the angle, and the mount’s geometry correctly aligns the optic vertically over the bore at a consistent height in either position. The base and optic plates can also be reversed for a fully ambidextrous setup, and it pairs with a wide selection of Arisaka optic plates sold separately.

Key Specifications

• Offers a 35-degree or 45-degree offset position, set by reversing the stem.
• Finished in black.
• Maintains consistent optic height and vertical bore alignment at either angle.
• Base and plates are reversible for a fully ambidextrous mount.
• Compatible with a wide range of red dot optics via interchangeable plates.

Frequently Asked Questions

How do I switch between 35 and 45 degrees? Reverse the stem between the optic plate and base during assembly.

Is this mount ambidextrous? Yes, the base and optic plates can be reversed for either side.

Does this include an optic plate? This is the base; optic plates for specific red dot models are sold separately.

Buy the Arisaka Offset Optic Mount Base, Black

This patented base gives you a repeatable, ambidextrous offset mount at either 35 or 45 degrees. Order from our Arisaka Defense lineup in our red dot mounts category, shipped fast from our Lubbock, Texas gun shop.