Arisaka Defense

OFFSET OPTIC MOUNT – BLACK

Item # ARIS OOM-BASE MSRP $100.00
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$100.00
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SKU
ARIS OOM-BASE
MPN
OOM-BASE
UPC
601557939623
FFL Required
No

PRODUCT DETAILS

TECH SPECS:

Precision-Engineered 35°/45° Modular Mount to Add an Offset Red Dot

Elevate your AR rifle setup with the Arisaka Offset Optic Mount—a rugged, ultra-low-profile platform that allows mounting your red dot sight at a 35° or 45° offset without additional adapters. Expertly crafted in the USA from 6061-T6 aluminum and finished in MIL-A-8625 Type III hard-coat anodizing, this mount preserves a low one-third co-witness with your primary optic and maintains perfect vertical alignment over the bore in both positions

Key Features

  • Adjustable Offset Angles: Choose 35° (closer clearance) or 45° (to clear larger turrets) by simply reversing the stem during installation

  • Ultra Compact & Lightweight: Just 1″ long, occupies three Picatinny slots, and weighs ~1.9?oz—even with standard plate installed 

  • Modular & Reversible: Designed for ambidextrous mounting—reverse the base and plate to use on the left or right side of your rail 

  • Consistent Optic Height: Maintains optic height and centerline over bore at both angles for reliable sighting during cant and transitions

  • Highly Compatible: Works with a wide range of red dot sights when used with the correct snap-in optic plate—sold separately. Compatible optics include Trijicon RMR/SRO, Aimpoint Micro, Holosun, SIG Romeo, Vortex Venom/Viper, Leupold DPP, and C-More

  • Premium Construction: Base and plates CNC-machined from 6061-T6 aluminum and finished with MIL-A-8625 Type III hard-coat anodize for durability and corrosion resistance

  • Made in the USA: Designed and manufactured domestically and covered under U.S. Patent No. 11,067,365

In the Box

  • Arisaka Offset Optic Mount Base (Black)

  • Your choice of optic-compatible plate (must purchase separately unless bundled)

  • Torx-plus IP20 & IP27 bit drivers

  • Installation instructions and torque specs included

 Ideal For

  • Users running a primary magnified optic who want fast-use red dot backup without removing their main scope

  • Left- or right-handed shooters looking for modular, mirrored mounting setups

  • Precision shooters needing consistent vertical alignment and cheek weld at offset angles

Configuration Notes

  • Choose Standard Height Plates (1.5″–1.8″) or Tall Plates (1.9″–2.2″) to match your optic’s mounting height

  • Consult listed compatibility tables to select the correct plate for your red dot model

  • Recommended torque values: Picatinny base clamp set at 55?in-lb; plate stem screws at 30?in-lb; optic-to-plate screws per optic manufacturer (generally not exceeding 20?in-lb) 


With superior build quality, thoughtfully engineered geometry, and US-made precision, the Arisaka Defense Offset Optic Mount – Black is the premium solution for shooters demanding seamless offset usability.

Specification Details
Manufacturer Arisaka Defense
Product Type Offset Optic Mount
Offset Angle Configurable to 35° or 45° (reversible stem)
Mounting Interface Picatinny (1913) – requires 3 slots
Material 6061-T6 Aluminum
Finish MIL-A-8625 Type III Hard Coat Anodized
Weight ~1.9 oz (with standard height plate)
Mount Length 1.0 inch
Mount Height Varies based on optic plate (Standard or Tall plates available separately)
Compatibility Accepts modular Arisaka optic plates for: RMR/SRO, DPP, Aimpoint Micro, Holosun, SIG Romeo, Vortex Venom/Viper, C-More, and more
Orientation Ambidextrous – reversible for left or right-side offset
Made in USA Yes
Patent U.S. Patent No. 11,067,365
Includes Mount base, mounting hardware, Torx bits, instructions
Recommended Torque Clamp screws: 55 in-lb, Stem screws: 30 in-lb, Optic: per manufacturer specs

Questions 0

Ask a Question
Question
Don 2 weeks ago
What is the difference between a bolt-action rifle and a semi-automatic rifle? Answers (1)

Proven Arms & Outfitters A bolt-action rifle requires the shooter to manually operate a bolt to load a round, eject the spent casing, and chamber the next round. In contrast, a semi-automatic rifle is designed to automatically eject the spent casing and chamber a new round with each pull of the trigger. Semi-automatic rifles offer faster follow-up shots, while bolt-action rifles are typically more accurate due to their design.

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PRODUCT DETAILS

TECH SPECS:

Precision-Engineered 35°/45° Modular Mount to Add an Offset Red Dot

Elevate your AR rifle setup with the Arisaka Offset Optic Mount—a rugged, ultra-low-profile platform that allows mounting your red dot sight at a 35° or 45° offset without additional adapters. Expertly crafted in the USA from 6061-T6 aluminum and finished in MIL-A-8625 Type III hard-coat anodizing, this mount preserves a low one-third co-witness with your primary optic and maintains perfect vertical alignment over the bore in both positions

Key Features

  • Adjustable Offset Angles: Choose 35° (closer clearance) or 45° (to clear larger turrets) by simply reversing the stem during installation

  • Ultra Compact & Lightweight: Just 1″ long, occupies three Picatinny slots, and weighs ~1.9?oz—even with standard plate installed 

  • Modular & Reversible: Designed for ambidextrous mounting—reverse the base and plate to use on the left or right side of your rail 

  • Consistent Optic Height: Maintains optic height and centerline over bore at both angles for reliable sighting during cant and transitions

  • Highly Compatible: Works with a wide range of red dot sights when used with the correct snap-in optic plate—sold separately. Compatible optics include Trijicon RMR/SRO, Aimpoint Micro, Holosun, SIG Romeo, Vortex Venom/Viper, Leupold DPP, and C-More

  • Premium Construction: Base and plates CNC-machined from 6061-T6 aluminum and finished with MIL-A-8625 Type III hard-coat anodize for durability and corrosion resistance

  • Made in the USA: Designed and manufactured domestically and covered under U.S. Patent No. 11,067,365

In the Box

  • Arisaka Offset Optic Mount Base (Black)

  • Your choice of optic-compatible plate (must purchase separately unless bundled)

  • Torx-plus IP20 & IP27 bit drivers

  • Installation instructions and torque specs included

 Ideal For

  • Users running a primary magnified optic who want fast-use red dot backup without removing their main scope

  • Left- or right-handed shooters looking for modular, mirrored mounting setups

  • Precision shooters needing consistent vertical alignment and cheek weld at offset angles

Configuration Notes

  • Choose Standard Height Plates (1.5″–1.8″) or Tall Plates (1.9″–2.2″) to match your optic’s mounting height

  • Consult listed compatibility tables to select the correct plate for your red dot model

  • Recommended torque values: Picatinny base clamp set at 55?in-lb; plate stem screws at 30?in-lb; optic-to-plate screws per optic manufacturer (generally not exceeding 20?in-lb) 


With superior build quality, thoughtfully engineered geometry, and US-made precision, the Arisaka Defense Offset Optic Mount – Black is the premium solution for shooters demanding seamless offset usability.

Specification Details
Manufacturer Arisaka Defense
Product Type Offset Optic Mount
Offset Angle Configurable to 35° or 45° (reversible stem)
Mounting Interface Picatinny (1913) – requires 3 slots
Material 6061-T6 Aluminum
Finish MIL-A-8625 Type III Hard Coat Anodized
Weight ~1.9 oz (with standard height plate)
Mount Length 1.0 inch
Mount Height Varies based on optic plate (Standard or Tall plates available separately)
Compatibility Accepts modular Arisaka optic plates for: RMR/SRO, DPP, Aimpoint Micro, Holosun, SIG Romeo, Vortex Venom/Viper, C-More, and more
Orientation Ambidextrous – reversible for left or right-side offset
Made in USA Yes
Patent U.S. Patent No. 11,067,365
Includes Mount base, mounting hardware, Torx bits, instructions
Recommended Torque Clamp screws: 55 in-lb, Stem screws: 30 in-lb, Optic: per manufacturer specs

Overall Rating
Reviews 0

0.0 / 5.0

(Based on 0 Reviews)

Review Stats View All
5 Stars
0
4 Stars
0
3 Stars
0
2 Stars
0
1 Stars
0
Photos Verified Purchases

No Customer Review on this product

Questions 0

Ask a Question
Question
Don 2 weeks ago
What is the difference between a bolt-action rifle and a semi-automatic rifle? Answers (1)

Proven Arms & Outfitters A bolt-action rifle requires the shooter to manually operate a bolt to load a round, eject the spent casing, and chamber the next round. In contrast, a semi-automatic rifle is designed to automatically eject the spent casing and chamber a new round with each pull of the trigger. Semi-automatic rifles offer faster follow-up shots, while bolt-action rifles are typically more accurate due to their design.