Electronic SightsArisaka DefenseSold by Brownells

Arisaka Defense

Offset Optic Mount - Offset Plate, Sig Romeo 1/ 1 Pro For 1.9'''' - 2.2'''' Scope Mount

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

Modular Offset

Optic mount for red dot

Selects 35

45 degree offset position without

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: 430104532

Overview

Designed for AR15 setups that pair a primary scope with a red dot sight, this offset mount gives the shooter a modular way to place the optic at either 35 or 45 degrees without adding extra components. The 35-degree position sits closer to slimmer scopes, while the 45-degree option offers more room around larger turrets or 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 between magnified glass and a close-range aiming point.

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

Attaches Top

Picatinny rail of an AR15

Maintains Centered

Over-bore alignment when the rifle

Key Features

  • Modular offset optic mount for red dot sights
  • Selects 35 or 45 degree offset position without extra components
  • 35 degree setting places the optic closer to slimmer scopes
  • 45 degree setting 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 alongside a slimmer scope on a top Picatinny rail
  • Shooters needing a 35-degree offset position for closer fit around compact optics
  • Users with wider turrets or larger scopes who need 45-degree offset clearance
  • Hunters wanting a canted backup sight setup while maintaining lower 1/3 co-witness height

Specifications

Attachment TypeTop Picatinny rail
Co Witness HeightLower 1/3
CompatibilitySig Romeo 1 / 1 Pro
Mount TypeOffset optic mount
Offset Positions35 degree or 45 degree
PlatformAR15 rifle
Scope Mount 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.
  • Attaches to the top Picatinny rail of an AR15 rifle.
  • Maintains centered over-bore alignment when the rifle is canted.
  • Designed to preserve a lower 1/3 co-witness height.

Considerations & Trade-offs

  • Modular offset positioning is limited to 35 or 45 degrees, so setup is flexible but not infinitely adjustable.
  • Designed for attachment to the top Picatinny rail of an AR15 rifle, so it is platform-specific rather than a universal mount.
  • Intended for use with a red dot sight and a compatible scope setup; it is not a standalone optic solution.
  • The product is described as an offset plate for Sig Romeo 1/1 Pro with 1.9"–2.2" scope mount compatibility, so fitment should be checked carefully before purchase.

Suggested Comparisons

  • Offset optic mounts
  • AR-15 Picatinny rail accessories
  • Red dot sight mounting plates
  • Scope-mounted backup sighting solutions

Suggested Accessories

  • Picatinny rail mount accessories
  • Red dot sight accessories
  • AR15 mounting accessories
  • Optic mounting hardware

Frequently Asked Questions

What red dot footprint does this offset plate fit?

This version is for Sig Romeo 1 / 1 Pro. No other footprints are listed in the provided product data.

Can I choose the offset angle on this mount?

Yes. The mount is described as modular and allows either a 35 degree or 45 degree offset position without additional components.

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

The 35 degree position brings the red dot closer to slimmer, smaller scopes. 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 product data say anything about included hardware or materials?

No. The provided data does not list included hardware, material details, or other construction specifications.