Offset Optic Mount - Offset Plate, Holosun 407k & 507k For 1.5''''- 1.8'''' Scope Mount

Name: Offset Optic Mount - Offset Plate, Holosun 407k & 507k For 1.5''''- 1.8'''' Scope Mount
Brand: Arisaka Defense
SKU: 430104534
Price: 25.00 USD
Availability: InStock

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 position sits closer to slimmer, smaller scopes, while the 45 degree option offers more clearance around wider turrets or larger, higher magnification optics. Mounted to the top Picatinny rail, it keeps the offset sight centered over the bore and maintains 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 solution on a scoped rifle.

Why Hunters Choose the Arisaka Defense

Modular Design

Lets you choose 35 or

35 Degree

Position places the red dot

45 Degree

Position adds clearance around wider

Attaches 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
Selects 35 or 45 degree offset without extra components
35 degree position sits closer to slimmer, smaller scopes
45 degree position adds clearance for 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 alongside a slimmer, smaller scope on top rail
Shooters needing a 35-degree offset position for closer placement near compact optics
Users running wider turrets or larger magnification scopes who want 45-degree clearance
Hunters building a canted backup sight setup while maintaining lower 1/3 co-witness height

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 adds clearance around wider turrets and larger magnified 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 AR15 top Picatinny rails, so it is not a universal solution for other rifle platforms or rail setups.
The 35-degree and 45-degree positions are useful for different optic and scope sizes, but choosing the wrong angle for your setup can leave the red dot closer than desired or with more clearance than needed.
It is intended for Holosun 407k and 507k pattern optics, so compatibility is limited to that footprint.
The offset design is meant to maintain lower 1/3 co-witness when the rifle is canted, which is a setup-specific benefit rather than a standalone mounting advantage.

Suggested Comparisons

Offset optic mounts
Red dot sight mounting solutions
AR-15 Picatinny rail accessories
Scope-mounted offset sight setups

Suggested Accessories

Picatinny rail mount
Red dot sight
Scope mount
AR-15 accessory

Frequently Asked Questions

What optics is this offset plate made for?

The product title identifies it as an offset plate for Holosun 407k and 507k optics.

What mounting platform is this designed to attach to?

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

Can I choose the offset angle?

Yes. The mount lets you select either a 35 degree or 45 degree offset position without needing additional components.

Why would I choose 35 degrees versus 45 degrees?

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

Does the description say anything about the optic’s height or bore alignment when used?

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.