Upgrade Your Keystone Rings for a Piggyback Red Dot

Already own or buying our flagship Keystone Scope Rings? This is the most integrated way to add a red dot sight to your setup. The EGW Keystone Piggyback Conversion Ring Cap is designed to directly replace the standard top half of one of your 1" Keystone rings. This turns your existing ring into a rock-solid foundation for one of our piggyback red dot adapter plates.

Instead of adding a separate, standalone ring to your scope tube, this innovative cap provides a cleaner, more streamlined solution. Simply un-screw your standard Keystone ring cap, swap it with this conversion cap, and you're ready to mount the EGW red dot adapter plate of your choice (sold separately). It's the ultimate upgrade for the serious shooter who demands a sleek, lightweight, and robust system.

The Keystone Conversion Advantage:

• Seamless Integration: Directly replaces the top cap on any EGW 1" Keystone Scope Ring—no extra clamps on your scope.
• The Smart Upgrade Path: A cost-effective solution for existing Keystone ring owners to add a piggyback red dot.
• Requires Adapter Plate: Drilled and tapped to accept EGW's line of red dot adapter plates (sold separately).
• Lightweight & Strong: Precision CNC-machined from 6061 aluminum to match your Keystone rings perfectly.
• Made in the USA: Designed, machined, and assembled with pride in Quakertown, Pennsylvania.

The Modern Advantage: Why We Use Aircraft-Grade Aluminum

We use domestically-sourced 6061 aircraft-grade aluminum because it allows us to create a part that is both incredibly strong and dimensionally identical to the original cap it replaces. This guarantees a perfect, stress-free fit on your scope tube while providing a rigid platform for your red dot adapter. It's the only material that meets the demanding standards of the Keystone series.

Specifications:

• Product: Keystone Piggyback Conversion Ring Cap
• Compatibility: Replaces the top cap on any EGW 1" Keystone Scope Ring
• Required Accessory: EGW Red Dot Adapter Plate (sold separately)
• Material: 6061 Aircraft Grade Aluminum
• Finish: Matte Black Anodized
• GTIN: 841370119721

Helpful Resources & Guides

Learn more about how to get the most out of your rifle setup.

• Buyer's Guide: The Best Scope Rings for Picatinny & Weaver Rails
• The Ultimate Scope Ring Height Chart & Calculator

Frequently Asked Questions (FAQ)

Q: What do I need to make this work?

A: You need two things: 1) A set of EGW 1" Keystone Scope Rings already on your rifle. 2) The EGW Red Dot Adapter Plate that matches your specific red dot sight (sold separately). You can conveniently select the correct adapter plate for your specific red dot model from the add-on options on this product page before adding to your cart. This cap replaces the top half of one of your existing Keystone rings.

Q: Is this a complete ring?

A: No. This is a ring cap only. It is only the top half of a scope ring. It does not include the bottom half or the crossbolt needed to attach it to a rifle.

Q: Why would I buy this instead of the "Universal Piggyback System Base Ring"?

A: You would buy this if you already own our Keystone rings. This provides a more integrated and streamlined look by using your existing ring as the base, rather than adding a completely separate third ring to your scope tube.

Q: Does this include the red dot adapter plate?

A: No. The red dot adapter plate must be purchased separately. This allows you to choose the plate that correctly fits your specific model of red dot sight.

Q: Will this fit on your "Practical" series rings?

A: No. This conversion cap is designed exclusively to fit the dimensions and screw pattern of our Keystone Series rings.