The Arisaka Tailcap Adapter for Rail Mounted Streamlight ProTac HL-X, Black is a light mount that fits Rail Mounted Streamlight ProTac HL-X.
This product is not compatible with the Protac 2.0 Rail Mount Lights. This adapter requires the use of a Surefire UE or DS tailcap to function, which is not included. The Arisaka Tailcap Adapter allows Streamlight Protac Rail Mount HL-X lights to use Surefire Scout tailcaps and remote switches. In particular, the Protac Rail Mount lights can now be used with the Surefire SR-D-IT and TNVC/Unity TAPS dual switches, which are commonly paired with laser/illuminators like the ATPIAL and DBAL series. One of the main flaws of the Protac Rail Mount lights is also addressed: Streamlight did not design a front battery spring into the light, so under recoil the battery can come off the front contact and cause the light to flicker or blink. To help prevent this behavior the adapter includes two different o-rings (one for CR123 cells, one for 18650 cells) which can be placed on the back end of the battery before screwing on the adapter. The o-ring ensures the battery cannot move rearward while firing. This adapter requires the use of a Surefire UE or DS tailcap to function. It also does NOT work with the Rail Mount HL-X Laser model.
How It Compares
Also compare the Offset Scout Mount for M-LOK, Q-Sert Compatible, Inline Scout Mount for SureFire Scout Light and Light Mount for SureFire Scout Light Weapon Lights. Browse all light Mounts and the full Arisaka range. New to this? Read our guide: How to Choose a Weapon Light: Lumens, Candela and Runtime.
Ideal For
- Streamlight ProTac Rail Mount HL-X owners (non-laser model only)
- Running SureFire UE or DS tailcaps and Scout remote switches
- Pairing with SureFire SR-D-IT or TNVC/Unity TAPS dual switches
- Stopping battery flicker under recoil with the included o-rings
Key Features
- Diameter: 1.04"
- Length: 0.49" additional length to light (plus tailcap)
- Weight: 0.6 oz
- Made in the USA
- Anodized Finish
- Allows Use of SureFire Tailcaps on Rail Mounted Streamlight ProTac HL-X
Compatibility & Fitment
Fits Rail Mounted Streamlight ProTac HL-X. Not sure it fits? Contact us before you order and we will check for you.
Technical Specifications
Brand | Arisaka |
Type | Light Mount |
Model | Tailcap Adapter |
Finish | Anodized |
Color | Black |
MPN | TA-RMHLX |
UPC | 601557939517 |
US Shipping & Support
Genuine Arisaka, brand new and covered by the manufacturer's warranty. Shipping is free on US orders of $99 or more, and smaller orders ship from $6.95. Questions about fit, mounting or which option suits your setup? Our team is glad to help before and after your purchase.
Frequently Asked Questions
What does the Tailcap Adapter fit?
Fits Rail Mounted Streamlight ProTac HL-X.
Is this a genuine Arisaka product?
Yes. It is a new, genuine Arisaka product sourced through an authorized US distributor.
How much is shipping?
Shipping is free on US orders of $99 or more. Orders under $99 ship at a flat rate from $6.95 to $9.95, depending on the order total.
