Electronic SightsArisaka DefenseSold by Brownells

Arisaka Defense

Offset Optic Mount - Plate #5 Standard Height (1.5''''-1.8'''') Optic Plate

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Modular Offset

Optic mount for a red

Selects Either

35 or 45 degree offset

35 Degree

Position sits closer to slimmer,

45 Degree

Position adds clearance around wider

Attaches Top

Picatinny rail of an AR15

$25.00
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SKU: 100040410

Overview

Designed for AR15 setups that pair a primary scope with a red dot, this offset optic mount gives the shooter a choice of 35 or 45 degree placement without needing extra components. The 35 degree option sits closer to slimmer scopes, while the 45 degree option offers more room around larger optics and wider turrets. Mounted to the top Picatinny rail, it keeps the offset sight centered over the bore when the rifle is canted and maintains a lower 1/3 co-witness height. It is a practical modular solution for hunters and shooters who want a streamlined transition to a close-range aiming option on the same rifle.

Why Hunters Choose the Arisaka Defense

Modular Design

Lets you choose 35 or

No Additional

Components required for selecting the

35 Degree

Option sits closer to slimmer,

45 Degree

Option provides added clearance around

Attachment Top

Picatinny rail of an AR15

Key Features

  • Modular offset optic mount for a red dot sight
  • Selects either 35 or 45 degree offset position
  • 35 degree position sits closer to slimmer, smaller scopes
  • 45 degree position adds clearance around wider turrets or larger scopes
  • Attaches to the top Picatinny rail of an AR15 rifle
  • Maintains lower 1/3 co-witness height when the rifle is canted

Best Used For

  • AR15 users mounting a red dot sight alongside a slimmer, smaller scope
  • Shooters needing a 35-degree offset position without adding extra components
  • Users running larger scopes or wider turrets who want 45-degree clearance
  • Hunters and rifle users who prefer a canted backup sighting option
  • AR platform owners seeking a lower 1/3 co-witness height setup

Specifications

Co Witness Heightlower 1/3
Designed Forred dot sight
HeightStandard Height (1.5''''-1.8'''')
Modular Mounting Solutiontrue
Mounting Locationtop Picatinny rail of an AR15 rifle
Offset Positions35 degree or 45 degree
Optic Centered Over Boretrue
Patent Pendingtrue
Plate Number#5
Requires Additional Componentsfalse

Pros

  • Modular design lets you choose 35 or 45 degree offset positioning.
  • No additional components required for selecting the offset position.
  • 35 degree option sits closer to slimmer, smaller scopes.
  • 45 degree option provides added clearance around larger turrets and higher magnification scopes.
  • Designed for attachment to the top Picatinny rail of an AR15 rifle.
  • Maintains lower 1/3 co-witness height when the rifle is canted.

Considerations & Trade-offs

  • This mount is designed for AR15 rifles with a top Picatinny rail, so it is not a universal solution for other platforms or rail setups.
  • The 35 degree and 45 degree positions solve different clearance needs, which means the best setup depends on the size of the primary optic and its turrets.
  • It is intended for use with a red dot sight as an offset optic, so it adds a second sighting system rather than replacing the primary optic.
  • The listed optic plate is a standard-height option, so buyers should confirm the 1.5"-1.8" height range matches their intended setup.

Suggested Comparisons

  • AR-15 optic mounts
  • Offset red dot mounts
  • Picatinny rail accessories
  • Red dot sight mounting plates

Suggested Accessories

  • Red dot sight
  • Picatinny rail mount
  • AR-15 accessory
  • Optic mounting hardware

Frequently Asked Questions

What mounting position options does this offset optic mount offer?

It allows the user to select either a 35 degree or 45 degree offset position for a red dot sight without requiring additional components.

What is the difference between the 35 degree and 45 degree positions?

According to the product description, the 35 degree position brings the red dot sight closer to slimmer, smaller scopes, while the 45 degree position provides additional clearance around wider turrets or larger, higher magnification scopes.

What type of rifle setup is this mount designed for?

It is designed to attach to the top Picatinny rail of an AR15 rifle.

Does the optic stay centered when the rifle is canted?

Yes. The description states that when the rifle is canted to use the offset red dot sight, the optic remains centered over the bore and maintains a lower 1/3 co-witness height.

Is this a complete mounting system or does it need extra parts?

The description says the mount provides 35 or 45 degree offset positioning without requiring additional components, but the provided data does not specify every part included in the package.