Electronic SightsArisaka DefenseSold by Brownells

Arisaka Defense

Offset Optic Mount - Plate #10 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

Optic mount for a red

Selects 35

45 degree offset position without

35 Degree

Setting places the optic closer

45 Degree

Setting provides additional clearance for

Attaches Top

Picatinny rail of an AR15

$25.00
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SKU: 100040230

Overview

This modular offset mount is built for AR15 setups that pair a red dot sight with a primary optic on the top Picatinny rail. It offers a choice of 35 or 45 degree placement without requiring additional components, letting the user match the offset position to slimmer scopes or to optics with wider turrets and larger profiles. When the rifle is canted, the sight stays centered over the bore and maintains a lower 1/3 co-witness height. For hunters and shooters who want a streamlined backup sighting option on a scoped rifle, it provides a practical mounting solution with a specific fitment focus.

Why Hunters Choose the Arisaka Defense

Modular Design

Lets you choose 35 or

35 Degree

Position places the red dot

45 Degree

Position provides added clearance around

Attachment Top

Picatinny rail of an AR15

Maintains Lower

1/3 co-witness height when the

Key Features

  • Modular offset optic mount for a red dot sight
  • Selects 35 or 45 degree offset position without extra components
  • 35 degree setting places the optic closer to slimmer, smaller scopes
  • 45 degree setting provides additional clearance for 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 wanting a canted red dot setup alongside a slimmer, smaller scope
  • Shooters running larger, higher-magnification scopes that need extra clearance around turrets
  • Hunters who prefer a modular offset mount with 35 or 45 degree positioning
  • AR platform owners seeking a lower 1/3 co-witness height with an offset optic

Specifications

Additional Components RequiredNo
Clearance Note35 degree position brings the red dot sight closer to slimmer, smaller scopes; 45 degree position provides additional clearance around wider turrets or larger, higher magnification scopes
Co Witness HeightLower 1/3
Compatible RailTop Picatinny rail
ModularYes
Mount TypeOffset optic mount
Offset Positions35 degree or 45 degree
Patent Pendingtrue
PlatformAR15 rifle
Red Dot Sight CompatibleYes
Tall Height Range1.9"-2.2"

Pros

  • Modular design lets you choose 35 or 45 degree offset without extra components.
  • 35 degree position places the red dot closer to slimmer, smaller scopes.
  • 45 degree position provides added 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.
  • Patent pending Arisaka Defense mounting solution for offset red dot use.

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 degree and 45 degree positions are purpose-driven choices: one favors slimmer, smaller scopes, while the other provides more clearance around wider turrets or larger, higher-magnification scopes.
  • This is a plate-specific setup, so compatibility depends on the correct optic plate selection and the intended red dot sight configuration.
  • It is intended to maintain a lower 1/3 co-witness height when canted, which may be a consideration for users who prefer a different sight picture or mounting height.

Suggested Comparisons

  • Offset red dot mounts
  • AR-15 optic mounting accessories
  • Picatinny rail optic mounts
  • Lower 1/3 co-witness optic mounts

Suggested Accessories

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

Frequently Asked Questions

What mounting positions does this offset optic mount support?

The mount lets you choose either a 35-degree or 45-degree offset position for a red dot sight, without needing 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 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 product is described as a modular mounting solution that allows 35- or 45-degree offset positioning without requiring additional components for that choice. The provided data does not specify any other parts that may or may not be needed for a full setup.