Electronic SightsArisaka DefenseSold by Brownells

Arisaka Defense

Offset Optic Mount - Plate #1 Standard Height (1.5''''-1.8'''') Optic Plate

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

Patent Pending

Modular offset optic mount for

Selects Either

35 or 45 degree offset

35 Degree

Setting places the optic closer

45 Degree

Setting adds clearance around wider

Attaches Top

Picatinny rail of an AR15

$25.00
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SKU: 100040406

Overview

This modular offset mount is built for AR15 setups that pair a red dot with a primary optic, giving the shooter a choice of 35 or 45 degree placement without adding extra components. The 35 degree option sits closer to slimmer scopes, while the 45 degree option leaves more room around larger turrets and higher-magnification optics. Mounted to the top Picatinny rail, it keeps the offset sight centered over the bore and at a lower 1/3 co-witness height when the rifle is canted. It is a practical option for hunters and shooters who want a streamlined transition to a close-range aiming point without changing the core optic setup.

Why Hunters Choose the Arisaka Defense

Modular Design

Lets you choose 35 or

35 Degree

Position sits closer to slimmer,

45 Degree

Position provides additional clearance for

Attaches Top

Picatinny rail of an AR15

Maintains Lower

1/3 co-witness height when the

Key Features

  • Patent pending modular offset optic mount for red dot sight use
  • Selects either 35 or 45 degree offset position without extra components
  • 35 degree setting places the optic closer to slimmer, smaller scopes
  • 45 degree setting adds clearance around wider turrets or larger scopes
  • Attaches to the top Picatinny rail of an AR15 rifle
  • Maintains centered over-bore alignment and lower 1/3 co-witness height when canted

Best Used For

  • AR15 users mounting a red dot sight alongside a slimmer, smaller scope setup
  • Shooters needing a 35-degree offset position for closer optic placement
  • Rifle setups with wider turrets or larger magnification scopes requiring 45-degree clearance
  • Hunters wanting a canted red dot option that maintains lower 1/3 co-witness height
  • Users seeking a modular mount without adding extra components

Specifications

Co Witness HeightLower 1/3
CompatibilityRed dot sight
Height Range1.5''-1.8''
Mount TypeOffset optic mount
Offset Positions35 degree or 45 degree
Patent StatusPatent pending
PlatformAR15 rifle
Rail AttachmentTop Picatinny rail

Pros

  • Modular design lets you choose 35 or 45 degree offset without extra components.
  • 35 degree position sits closer to slimmer, smaller scopes.
  • 45 degree position provides additional clearance for wider turrets and larger scopes.
  • Attaches to the top Picatinny rail of an AR15 rifle.
  • Maintains a lower 1/3 co-witness height when the rifle is canted.

Considerations & Trade-offs

  • This mount is designed for an AR15 top Picatinny rail, so it is platform-specific rather than a universal optic solution.
  • The 35 degree and 45 degree positions serve different clearance needs, so the best setup depends on the size and turret profile of the primary scope.
  • It is intended for use with a canted rifle position to access the offset red dot, which adds a different shooting posture and manual step.
  • The product is sold as a plate-specific optic mount, so compatibility depends on the selected plate and the sight setup being used.

Suggested Comparisons

  • Offset red dot sight mounts
  • AR15 Picatinny rail accessories
  • Optic mounting plates
  • Backup sighting solutions

Suggested Accessories

  • Optic mounting plate
  • Picatinny rail accessory
  • Red dot sight mount
  • AR15 rifle accessory

Frequently Asked Questions

What mounting setup is this optic plate designed for?

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

Can I choose the offset angle on this mount?

Yes. The mount lets the user select either a 35-degree or 45-degree offset position without requiring additional components.

When would the 35-degree position be useful?

The 35-degree position brings the red dot sight closer to slimmer, smaller scopes.

When would the 45-degree position be useful?

The 45-degree position provides additional clearance around wider turrets or larger, higher magnification scopes.

What does the description say about sight height and alignment?

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.