Optic AccessoriesBadger OrdnanceSold by Brownells

Badger Ordnance

Angle Cosine Indicator Ring Caps - 30mm Aci Ring Cap

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

Mounts Angle

Cosine indicator directly to your

Quickly Replaces

Cap on Badger Ordnance scope

Unobstructed View

Of the ACI for angle

Badger Ordnance

30mm, 4-screw scope rings

Screws Not

Included; reuse the cap screws

$63.00
List Price: $90.99
You Save: $27.99 (31%)
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SKU: 093000038

Overview

This ring cap is designed for hunters and precision shooters who want an angle cosine indicator mounted directly to the scope for fast angle reference. It replaces the existing cap on compatible Badger Ordnance 30mm, 4-screw scope rings and provides an unobstructed view of the indicator for quick reads of uphill and downhill trajectory angles. The cap accepts popular ACI units, including models from Sniper Design Tools, and uses the cap screws already supplied with your rings. It is a focused accessory for setups where immediate angle information matters, but it is specific to compatible Badger Ordnance rings.

Why Hunters Choose the Badger Ordnance

Enables Direct

Mounting of an angle cosine

Unobstructed View

Of the ACI for quick

Replaces Existing

Cap on compatible Badger Ordnance

Badger Ordnance

30mm, four-screw scope rings

Accepts Popular

Angle cosine indicators from Sniper

Key Features

  • Mounts an angle cosine indicator directly to your scope
  • Quickly replaces the cap on Badger Ordnance scope rings
  • Provides an unobstructed view of the ACI for angle reading
  • Designed for Badger Ordnance 30mm, 4-screw scope rings
  • Screws not included; reuse the cap screws that came with your rings
  • Machined from 6061 T6 aluminum with hardcoat anodized matte black finish

Best Used For

  • Hunters using Badger Ordnance 30mm (4-screw) scope rings with a compatible ACI setup
  • Long-range shooters who want a direct, unobstructed view of their angle cosine indicator
  • Field users needing quick uphill and downhill angle checks without removing their eye from the optic
  • Owners replacing an existing ring cap and reusing the original cap screws
  • Shooters already using compatible angle cosine indicators from Sniper Design Tools

Specifications

Blade FinishHardcoat anodized, matte black
Compatible AciPopular angle cosine indicators such as those from Sniper Design Tools (#100-001-423 and #100-003- Mfg: Badger Ordnance)
Compatible Scope RingsBadger Ordnance 30mm (4-screw) scope rings
MaterialMachined 6061 T6 aluminum
Mount TypeDirect to scope
Screws IncludedNo
ViewInstantaneous, unobstructed view of the ACI to read uphill and downhill trajectory angles

Pros

  • Enables direct mounting of an angle cosine indicator to your scope ring cap.
  • Provides an unobstructed view of the ACI for quick angle checks.
  • Replaces the existing cap on compatible Badger Ordnance scope rings.
  • Designed for Badger Ordnance 30mm, four-screw scope rings.
  • Accepts popular angle cosine indicators from Sniper Design Tools.

Considerations & Trade-offs

  • Designed specifically for Badger Ordnance 30mm (4-screw) scope rings, so compatibility is limited to that ring setup.
  • Screws are not included; installation depends on reusing the cap screws that came with your rings.
  • The cap is intended to work with compatible angle cosine indicators, so it adds utility only if you already use an ACI.
  • This is a ring-cap replacement rather than a standalone accessory, so it requires an existing Badger Ordnance ring system.

Suggested Comparisons

  • Scope ring accessories
  • Angle cosine indicators
  • Scope mounting hardware
  • Precision rifle accessories

Suggested Accessories

  • Angle cosine indicator
  • Scope ring cap screws
  • Scope rings
  • Matte black scope accessories

Frequently Asked Questions

What does the ACI Ring Cap do on my scope rings?

It replaces the cap on compatible Badger Ordnance scope rings and lets you mount an angle cosine indicator directly to the scope.

Which scope rings is this 30mm ACI Ring Cap made for?

This model is for Badger Ordnance 30mm, 4-screw scope rings.

Are the mounting screws included?

No. The product notes that screws are not included and that you should reuse the cap screws that came with your rings.

What angle cosine indicators will it accept?

Badger Ordnance states that these ACI Ring Caps accept popular angle cosine indicators, including models from Sniper Design Tools listed in the product data.

What material and finish does the ring cap have?

The product is described as machined 6061 T6 aluminum with a hardcoat anodized, matte black finish.