Arisaka Tailcap Adapter for Streamlight Protac Rail Mount 1 & 2 — CNC 6061-T6 Aluminum, Type III Hard Coat

The Arisaka Tailcap Adapter converts Streamlight Protac Rail Mount 1 and 2 lights to accept SureFire Scout-style tailcaps and remote switches.

This precision-machined adapter lets you marry the robust rail-mount body of Streamlight Protac models with the familiar, field-proven tailcap and pressure-switch ecosystem used by many SureFire accessories. Built from aircraft-grade aluminum and finished with a military-spec hard coat, the piece preserves a low profile while adding electrical and mechanical compatibility so you can use remote switches, tape switches, and Scout tailcaps that you already own.

How does this adapter change what my Protac rail light can do?

By replacing the factory tailcap, the Arisaka adapter provides the correct thread, contact, and mechanical interface to accept Scout-style tailcaps and remotes. It does not alter the light’s output, but it allows remote activation and alternate tailcap options.

• Accepts SureFire-style tailcaps and pressure switches
• Enables remote on/off control without modifying the head unit
• Preserves original mounting footprint and rail clearance

Is this compatible with every Streamlight Protac model?

The adapter is specifically made for Streamlight Protac Rail Mount 1 and Rail Mount 2 lights and is not compatible with the Protac Rail Mount HL-X. Confirm your model before ordering.

• Designed for Protac Rail Mount 1 & 2 only
• Not compatible with Protac Rail Mount HL-X
• Check your light’s tail section dimensions to ensure fit

What materials and manufacturing standards were used?

Arisaka CNC machines this adapter from 6061-T651 aluminum and applies MIL-A-8625 Type III hard coat anodizing for durability and corrosion resistance. The result is a lightweight component that resists abrasion and delivers consistent mechanical tolerances.

• CNC machined 6061-T651 aluminum for strength and weight savings
• MIL-A-8625 Type III hard coat anodize for surface hardness and wear resistance
• Made in the USA with tight dimensional control

How does the adapter handle battery retention and electrical contact?

The adapter includes a removable buffer o-ring that secures battery position and reduces rattle inside the tube. Electrical continuity is preserved for compatible tailcaps/remote switches so activation remains reliable under recoil and movement.

• Removable buffer o-ring stabilizes battery placement
• Maintains reliable electrical contact for remote switches
• Designed to withstand normal field use and recoil forces

Who is this for: The Arisaka Tailcap Adapter suits shooters, law-enforcement personnel, and gear-minded enthusiasts who own Streamlight Protac Rail Mount 1 or 2 lights but prefer SureFire Scout-style tailcaps or remote pressure switches. It’s ideal if you want to standardize controls across multiple lights, add a low-profile remote, or replace a damaged tailcap without modifying your weapon light. Note: confirm model compatibility (not for HL‑X) before purchase.