SureFireWeapon Light
SureFire X400U-A Ultra Weapon Light Red Laser
- White light
- 1000 lumens output and 11,300 candela peak beam intensity
- Beam distance
- approximately 213 metres
- Laser
- Red, rated under 5 mW
- Power
- two CR123A lithium cells, approximately 1.25 hours of runtime
In stock — 7–10 business day delivery
Tracked delivery, estimated 7–10 working days
Want to know when it's back? Email us and we'll let you know
Multi-buy savings
Mix any optics and lights — applied automatically
- 5%2 items
- 10%3 items
- 15%4 or more
Applied automatically at checkout — no code needed. Accessories such as tailcaps, switches and mounts aren't included.
Complete your setup
- Shipped from the UK with tracked delivery
- 30-day returns on unused items
- Warranty support — contact us first
Delivery
Every order is shipped from the UK with tracked delivery. Estimated delivery time is 7–10 working days, and you will receive tracking details by email as soon as your order is on its way.
Returns
Unused items in their original packaging can be returned within 30 days. Email info@opticstrader.co.uk first and we will confirm the return details.
Warranty
Every product is new and boxed. If anything goes wrong, contact us first and we'll help with a manufacturer warranty claim where one applies.
The SureFire X400U-A Ultra Weapon Light with red laser, part number X400U-A-RD, is a compact pistol-mounted LED weapon light and laser aiming module in one. It produces 1000 lumens output and 11,300 candela peak beam intensity of white light for approximately 213 metres of beam distance, alongside a red laser rated under 5 mW.
White light and laser run from the same two CR123A lithium cells, for approximately 1.25 hours of runtime. The light attaches by the SureFire Rail-Lock System, which fits any host with a standard Picatinny accessory rail. The body measures 3.76 in (9.5 cm) and 4.9 oz (139 g), and is rated IPX7.
How it compares
The same light with a green laser is the SureFire X400U-A Ultra pistol light with green laser. For a focused 66,000 candela beam reaching roughly 514 metres, see the X400T-A Turbo pistol light with red laser. Browse all weapon light and laser combos, the wider SureFire range, or read our weapon light buying guide.
Ideal for
- Airsoft and training pistols with a Picatinny accessory rail
- Northern Ireland personal protection permit holders
- Shooters who want a light and an aiming laser on one compact unit
- Range boxes, kit bags and low-light practice
Key features
- White light: 1000 lumens output and 11,300 candela peak beam intensity
- Beam distance: approximately 213 metres
- Laser: Red, rated under 5 mW
- Power: two CR123A lithium cells, approximately 1.25 hours of runtime
- Mount: SureFire Rail-Lock System, universal Picatinny fit
- Size: 3.76 in (9.5 cm) and 4.9 oz (139 g)
- Water resistance: IPX7
| White Light | 1000 lumens output and 11,300 candela peak beam intensity |
| Beam Distance | Approximately 213 metres |
| Laser | Red laser, rated under 5 mW |
| Battery | Two CR123A lithium cells |
| Runtime | Approximately 1.25 hours |
| Mount | SureFire Rail-Lock System (universal Picatinny) |
| Length / Weight | 3.76 in (9.5 cm) long / 4.9 oz (139 g) |
| Water Resistance | IPX7 |
| MPN | X400U-A-RD |
Which rails does the SureFire X400U-A Ultra fit?
The SureFire X400U-A Ultra attaches with the SureFire Rail-Lock System, so it fits any host carrying a standard Picatinny accessory rail — a railed pistol dust cover, a carbine forend or a railed shotgun.
Can I add a remote switch to the SureFire X400U-A Ultra?
Yes — the XT07 weapon light remote switch tailcap is listed by SureFire for the X300 and X400 families and gives momentary and constant-on activation from a remote pressure pad.
How powerful is the laser on the SureFire X400U-A Ultra?
The SureFire X400U-A Ultra carries a red laser rated under 5 mW, powered from the same two CR123A lithium cells as the white light.
How far does the white light on the SureFire X400U-A Ultra reach?
The SureFire X400U-A Ultra produces 11,300 candela peak beam intensity for approximately 213 metres of beam distance, from 1000 lumens of total output.
What batteries does the SureFire X400U-A Ultra use?
The SureFire X400U-A Ultra runs on two CR123A lithium cells, giving approximately 1.25 hours of runtime, and is not a rechargeable light.
Every order is shipped from the UK with tracked delivery, with an estimated delivery time of 7–10 working days. Unused items in their original packaging can be returned within 30 days for a full refund.