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Arisaka Defense Offset Optic Red Dot Sight Mount OOM-BASE Color: Black, Finish: MIL-A-8625 Type III Hard Coat Anodized, 24% Off w/ Free Shipping

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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE
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Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE

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Questions & Answers
Does this mount work with a Burris Fastfire III? Which plate do I need to use? Thank you

It looks like plate #1.

by Keith, Verified Owner, August 19, 2021
See 1 More Answer
can I put a Holosun EPS, 508T or a 509T on this mount? Expert Answer

The Arisaka Defense Offset Optic Red Dot Sight Mount is designed to work with Arisaka Defense Offset Optic Plates. Each plate is designed to fit a specific optic footprint. For optics such as the Holosun EPS, you would need to use the Deltapoint Pro plate. For the 508T you will need the RMR plate, and the 509T has a specific plate as well. The adapter plate can be found linked below:
https://www.opticsplanet.com/arisaka-defense-offset-optic-plate.html

by Ethan, Gear Expert, February 12, 2025
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
35 Degree Option is Butter by Broken Jarhead, Verified Owner, July 26, 2022
If you're running a LPVO and want an offset rmr/red dot, buy this. It's expensive, but I've used 4 and this is the best I can find. Especially with multiple attachments, this is what you need. If your friends tell you it's dumb to have an LPVO and o...
Read More...
10/10 found this helpful
Helpful Positive Review
Offset red dot mount by Dr Skog, April 6, 2022
Strong, lightweight, and has good attachment points. Reaches out past the scope for easy sight adjustment. Minimal wrist movement to come on target. Its a little pricey but it is a specialty product. I would purchase again.
3/3 found this helpful
Helpful Positive Review
Tier 1 execution by TX2A, Verified Owner, December 14, 2021
Arisaka is the best! The machining and tolerances of their products is extremely impressive. As a mechanical engineer, I rarely see noteworthy products this one is unparalleled. The tolerances are so tight the piece literally pops together without...
Read More...
4/4 found this helpful
Helpful Positive Review
Great Offset Mount by Trice, April 12, 2020
Precision made offset mount. High quality product that can be set for 35 or 45 degree offset. Mine is set at 45 degrees to compensate for the large turrets on my scope. Will be getting another one soon for a second rifle.
5/6 found this helpful
Helpful Positive Review
Arisaka Offset Rmr Mount by Al, Verified Owner, September 1, 2020
I love this Mount so had the idea of offset rmr off my 1-8 scope so I tried 45 was nice but the 35 was money n just my luck arisaka’s Mount can do both can with everything I need to mount with two arisaka with another great product! The 35 offset cha...
Read More...
2/2 found this helpful
Helpful Negative Review
Delivered incomplete by Thomas, Verified Owner, November 10, 2021
The mount arrived but the package did not include the set of bases pictured in the advertisement. I cannot use the mount due to the lack of the base plates. I cannot find a disclaimer in the literature indicating the base plates are sold separately...
Read More...
10/66 found this helpful
Read All 32 Reviews
Color:
Black
Gun Make:
AR Platform
Gun Model:
AR-15
Red Dot Sights-Footprint:
Not Applicable
Attachment Type:
Picatinny
Optic Cut:
Not Applicable
Height:
0.18 in
Condition:
New
Included Accessories:
Standard

Code: 3KD-RMT-OOMARI-OOM-BASE

MPN: OOM-BASE

UPC: 601557939623

List: $130.99Save 24%
$100.00

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Arisaka Defense Offset Optic Red Dot Sight Mount

The Patent Pending Arisaka Offset Optic Mount is a modular mounting solution that allows the user to select a 35 or 45-degree offset position for a red dot sight without requiring additional components. The 35-degree position of these Red Dot Sight Mounts brings the red dot sight up closer to slimmer, smaller scopes, while the 45-degree position provides additional clearance around wider turrets or larger, higher magnification scopes.image

The Arisaka Defense Offset Optic Mount is designed to be attached to the top Picatinny rail of an AR15 rifle. When the rifle is canted to make use of the offset red dot sight, the optic remains centered over the bore and maintains a lower 1/3 co-witness height. The base and optic plates can be reversed, allowing for use on the left or right side. A wide selection of red dot sights are supported with six interchangeable optic plates (SOLD SEPARATELY):

  • Docter, Eotech, Insight, Meopta, Vortex Venom;
  • Trijicon RMR and SRO, Holosun 507C;
  • C-More;
  • Leupold Delta Point;
  • Aimpoint Micro T1/T2 and clones;
  • Aimpoint Acro

Specifications for Arisaka Defense Offset Optic Red Dot Sight Mount:

Manufacturer: Arisaka Defense
Color: Black
Finish: MIL-A-8625 Type III Hard Coat Anodized
Gun Make: AR Platform
Gun Model: AR-15
Gun Type: Rifle
Fabric/Material: 6061-T6 Aluminum
Red Dot Sights-Footprint: Not Applicable
Attachment Type: Picatinny
Optic Cut: Not Applicable
Length: 1 in
Height: 0.18 in
Weight: 1.9 oz
Condition: New
Included Accessories: Standard
Last Chance: Yes
Mount Type: Picatinny
Country of Origin: USA

Features of Arisaka Defense Offset Optic Red Dot Sight Mount:

  • Length: 1.0in for the base, which occupies three Picatinny slots (twin recoil lugs and clamping screw);
  • Height: The base sits 0.180in above the surface of the Picatinny rail;
  • The mount is CNC machined from 6061-T6 aluminum and MIL-A-8625 Type III hard coat anodized

Package Contents:

  • Arisaka Defense Offset Optic Red Dot Sight Mount
  • IP20 and IP27 Torx Plus Bit Drivers

Arisaka Defense Offset Optic Red Dot Sight Mount Orderable Models

List of Orderable Models

  • Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE , MPN: OOM-BASE , UPC: 601557939623 , Code: 3KD-RMT-OOMARI-OOM-BASE

Arisaka Defense Offset Optic Red Dot Sight Mount Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE , MPN: OOM-BASE-EDEMO , Code: 3KD-RMT-OOMARI-OOM-BASE-EDEMO-IN-B
  • USED, Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE , MPN: OOM-BASE-EDEMO , Code: 3KD-RMT-OOMARI-OOM-BASE-EDEMO-IN-C
  • USED Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE, EDEMO2, Used, Condition Fair , MPN: OOM-BASE-EDEMO2 , Code: 3KD-RMT-OOMARI-OOM-BASE-EDEMO2
  • USED Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE, EDEMO10, Used, Condition Fair , MPN: OOM-BASE-EDEMO10 , Code: 3KD-RMT-OOMARI-OOM-BASE-EDEMO10
  • USED, Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE , MPN: OOM-BASE-EDEMO , Code: 3KD-RMT-OOMARI-OOM-BASE-EDEMO-SC-D
  • USED Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE, EDEMO11, Used, Condition Fair , MPN: OOM-BASE-EDEMO11 , Code: 3KD-RMT-OOMARI-OOM-BASE-EDEMO11
  • USED, Arisaka Defense Offset Optic Mount Base, 6061-T6 Aluminum, MIL-A-8625 Type III Hard Coat Anodized, Black, OOM-BASE , MPN: OOM-BASE-EDEMO , Code: 3KD-RMT-OOMARI-OOM-BASE-EDEMO-US-B
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