Arisaka Defense Offset Optik Mount Base

The Arisaka Offset Optic Mount is a modular mounting solution that allows the user to select a 35 or 45 degree offset position for their red dot sight without additional components. The 35 degree position brings the red dot sight up closer to slimmer, smaller scopes, while the 45 degree position provides additional clearance around wider turrets.

The mount is set to 35 or 45 degrees by reversing the stem between the optic plate and base during assembly. The mount's unique geometry correctly aligns the optic vertically over the bore and maintains a consistent height at both 35 and 45 degrees.

Two heights of plates are offered; standard (1.5" to 1.8") and tall (1.9" to 2.2"). The base and optic plates can be reversed, making the mount fully ambidextrous. It is recommended that you choose the plate height that corresponds to your primary optic height. For example, if your scope is mounted in a 1.54” height mount, you’d choose the regular height plate for your offset red dot. This ensures a consistent cheek weld and seamless transition between your primary optic and offset red dot.

A wide selection of red dot sights are supported with interchangeable optic plates.

Standard height (for 1.5" to 1.8" scope mounts):

Plate 1: Docter, Eotech MRDS, Insight, Meopta, Vortex Venom/Viper, Burris Fastfire III, Crimson Trace CTS 1250/1300 and CT RAD/RAD Pro
Plate 2: Trijicon RMR, SRO, Holosun 407C, 507C, 508T, Swampfox Kingslayer, Liberty, Justice
Plate 3: C-More, Vortex Razor, SIG Romeo 3
Plate 4: Leupold Delta Point Pro, JPoint, Shield RMS, RMSc, Swampfox Sentinel, SIG Romeo Zero, Crimson Trace CT RAD Micro/Micro Pro, Eotech EFLX
Plate 5: Aimpoint Micro T1/T2/H1/H2, SIG Romeo 4, 5 (not 5X), Holosun HS403 (not A), HS503, HS515, HS530, Vortex Crossfire
Plate 6: Aimpoint Acro P1/P2, Steiner MPS
Plate 13: Holosun 509T, HE509-RD
Plate 15: SIG Romeo 1 and Romeo 1 Pro
Plate 18: Holosun 407K, 507K (EPS should use plate 2 with adapter included with optic)
Plate 21: Trijicon RMRcc

Tall height (1.9" to 2.2" scope mounts):

Plate 7: Docter, Eotech MRDS, Insight, Meopta, Vortex Venom/Viper, Burris Fastfire III, Crimson Trace CTS 1250/1300 and CT RAD/RAD Pro
Plate 8: Trijicon RMR, SRO, Holosun 407C, 507C, 508T, Swampfox Kingslayer, Liberty, Justice
Plate 10: Leupold Delta Point Pro, JPoint, Shield RMS, RMSc, Swampfox Sentinel, SIG Romeo Zero, Crimson Trace CT RAD Micro/Micro Pro, Eotech EFLX
Plate 11: Aimpoint Micro T1/T2/H1/H2, SIG Romeo 4, 5 (not 5X), Holosun HS403 (not A), HS503, HS515, HS530, Vortex Crossfire
Plate 12: Aimpoint Acro P1/P2, Steiner MPS
Plate 14: Holosun 509T, HE509-RD
Plate 16: SIG Romeo 1 and Romeo 1 Pro
Plate 17: 1913 Picatinny Rail Adapter (40 degrees only, non adjustable)
Plate 19: Holosun 407K, 507K (EPS should use plate 8 with adapter included with optic)
Plate 20: Trijicon MRO
Plate 22: Trijicon RMRcc

Please refer to your optic's manufacturer for correct torque values, but do not exceed 20 inch lbs on the screws that attach the optic to the plate. For instance, Aimpoint specifies just under 12 inch lbs for the Micro T1/T2.

The base and plates can each be purchased separately, providing an upgrade path in the future as users acquire new red dot sights.

Weight (without optic): 54g including standard optic plate. 62g including tall optic plate.

Length: 25,4mm for the base, which occupies three Picatinny slots (twin recoil lugs and clamping screw).

Height: The base sits 4,6mm above the surface of the Picatinny rail.

Each mount is CNC machined from 7075-T651 and 6061-T651 aluminum, and MIL-A-8625 Type III hard coat anodized. Please refer to the instructions for torque values and mount configuration. Plates include new screws (where needed) which we recommend using over the OEM screws, as long as the lengths are appropriate (pay attention while assembling). The Leupold DPP plate 4 and 10 include extra long screws to attach the optic to the plate that require a 2.5mm Allen key.

Hardware: One 10-32x1.5" Torx socket cap head screw, two M4x16mm screws. Each separate plate includes two M4x10mm screws.

Made in the USA.