Arisaka Offset Optic Plate 4 - Compatible with DPP/RMS Red Dot Sights

The Arisaka Offset Optic Plate 4 is a modular mounting solution designed to pair your Leupold Delta Point Pro, JPoint, Shield RMS, RMSc, Swampfox Sentinel, or SIG Romeo Zero red dot sight with a primary rifle scope on the same upper receiver. Instead of choosing between magnified optics and a dot, this plate lets you run both—offset to the side of your primary scope and canted into your sight picture when you need it. It's the kind of practical redundancy that makes sense whether you're hunting in variable light, training at distance, or running a modern defensive rifle.

The Offset Optic Plate 4 mounts to your AR15's top Picatinny rail via the Arisaka base (sold separately) and sits at standard height, making it the right choice if your scope mounts measure 1.5" to 1.8" tall. When your rifle is canted to bring the offset dot into your line of sight, the red dot stays centered over the bore and maintains a lower 1/3 co-witness—no parallax shift, no point-of-aim surprises. The plate itself is CNC machined from 6061-T6 aluminum and hard-coat anodized to military specs, keeping weight minimal (1.9 oz for the base) without sacrificing durability.

Because Arisaka designed this system modularly, you can buy just the plate if you already own a compatible base, or grab the combo and upgrade your red dot optic later without replacing the entire mount. The base occupies three Picatinny slots and includes the torx bit drivers you need for installation and adjustment. It's the kind of thoughtful engineering that separates a good mount from one that actually works in the field.

Key Features

• Modular design: upgrade or swap red dot sights without replacing the base
• CNC machined 6061-T6 aluminum construction with hard-coat anodize for durability
• Pairs seamlessly with scopes in the 1.5"–1.8" mount height range
• Maintains lower 1/3 co-witness height and bore centering when canted
• Minimal weight at 1.9 oz (base only) for zero performance penalty
• Includes Torx Plus bit drivers for installation and adjustment

Specifications

Frequently Asked Questions

What red dot sights work with the Arisaka Offset Optic Plate 4?

This plate is designed for the Leupold Delta Point Pro, JPoint, Shield RMS, Shield RMSc, Swampfox Sentinel, and SIG Romeo Zero. Make sure your primary scope mount is in the standard height range (1.5" to 1.8") for proper fitment.

Can I use this plate if my scope mount is taller than 1.8 inches?

No. The Arisaka Offset Optic Plate 4 is designed for standard-height scope mounts (1.5" to 1.8"). If your mounts are 1.9" to 2.2", you'll need a taller plate from the Arisaka lineup. Check the Arisaka product line for tall-height alternatives.

Do I need to buy the base separately, or does it come with the plate?

The Plate 4 is sold separately from the base. If you already own an Arisaka Offset Optic Mount base, you can purchase just the plate as an upgrade. If you're starting fresh, you'll need both the base and the plate.

How does the offset red dot stay accurate when I cant the rifle?

The Arisaka system maintains lower 1/3 co-witness height and keeps your red dot centered over the bore even when the rifle is canted to bring the offset sight into your line of sight. This eliminates parallax shift and point-of-aim deviation.