Electronic SightsArisaka DefenseSold by Brownells

Arisaka Defense

Offset Optic Mount - Plate #11 Tall Height (1.9''''-2.2'''') Optic Plate

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

Modular Offset

Mount for a red dot

Select Either

35-degree or 45-degree offset position

35-degree Setting

Places the red dot closer

45-degree Setting

Adds clearance around wider turrets

When Canted,

Optic stays centered over the

$25.00
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SKU: 100040231

Overview

This modular offset optic mount is built for AR15 setups that pair a red dot with a primary scope, giving the shooter a choice of 35 or 45 degree placement without adding extra components. The 35 degree option sits closer to slimmer, smaller scopes, while the 45 degree option offers more room around wider turrets or larger, higher-magnification optics. 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 choice for hunters and shooters who want a streamlined transition to a close-range aiming option on a scoped rifle.

Why Hunters Choose the Arisaka Defense

Modular Mount

35 or 45 degree offset

35 Degree

Setting places the red dot

45 Degree

Setting provides additional clearance around

Attachment Top

Picatinny rail of an AR15

Maintains Lower

1/3 co-witness height when the

Key Features

  • Modular offset mount for a red dot sight on an AR15 top Picatinny rail.
  • Select either a 35-degree or 45-degree offset position without extra components.
  • 35-degree setting places the red dot closer to slimmer, smaller scopes.
  • 45-degree setting adds clearance around wider turrets and larger magnified scopes.
  • When canted, the optic stays centered over the bore.
  • Maintains a lower 1/3 co-witness height.

Best Used For

  • AR15 users mounting a red dot beside a primary scope on the top Picatinny rail.
  • Shooters wanting a 35-degree offset for slimmer scopes and tighter optic placement.
  • Users needing 45-degree offset clearance around wider turrets or larger magnified scopes.
  • Hunters who prefer a canted backup sight while keeping lower 1/3 co-witness height.

Specifications

Additional Components RequiredNo
Centered Over BoreYes
Clearance NoteProvides additional clearance around wider turrets or larger, higher magnification scopes
Co Witness HeightLower 1/3
Compatible PlatformAR15 rifle
ModularYes
Mount TypeOffset Optic Mount
Offset Positions35 degree, 45 degree
Optic TypeRed dot sight
Patent Pendingtrue
Rail InterfaceTop Picatinny rail
Tall Height Range1.9''-2.2''

Pros

  • Modular mount offers 35 or 45 degree offset positioning without extra components.
  • 35 degree setting places the red dot closer to slimmer, smaller scopes.
  • 45 degree setting provides additional clearance around wider turrets and larger 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

  • Designed for AR15 top Picatinny rail use, so it is not a universal mount for other platforms or rail setups.
  • The 35° and 45° offset options solve different clearance needs, but the right choice depends on your optic and scope profile.
  • This is an optic plate only; additional red dot sight components are not included.
  • The listed tall height range (1.9"–2.2") makes fitment a key consideration for matching your setup.

Suggested Comparisons

  • Offset optic mounts for AR-15 rifles
  • Picatinny rail optic mounts
  • Red dot sight mounting plates
  • Modular offset sighting systems

Suggested Accessories

  • Picatinny rail mount
  • Red dot sight
  • Optic plate
  • Mounting hardware

Frequently Asked Questions

What mounting positions does this offset optic mount support?

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

What is this mount designed to attach to?

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

Why would a hunter choose the 35-degree position instead of the 45-degree position?

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.

Does the product description say how the optic sits when the rifle is canted?

Yes. 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.

What details are not provided in the source data?

The source data does not provide blade-related information, and it also does not specify material details, dimensions, weight, or performance claims beyond the mounting and co-witness information stated in the description.