SUREFIRE X400 Series Handgun Light Instruction Manual

X400 SERiES
HANDGUN LIGHT, THUMBSCREW MOUNT X400T-A-GN
X400T-A-RD
X400U-A-GN
X400U-A-RD

SPECIFICATIONS

| X400T-A-GN| X400T-A-RD| X400U-A-GN| X4000-A-RD
---|---|---|---|---
OUTPUT| 650 lumens|  X4000-A-GN| X400U-A-GN| 1,000 lumens
LASER OUTPUT| < 5.0 mW (635 nm)| <5.0 mW (515 nm)| < 5.0 mW (515 nm)| < 5.0 mW (635 nm)
LIGHT RUNTIME| 1.5 hours| 1.25 hours
LASER RUNTIME| 10 hours| 24 hours| 10 hours| 24 hours
PEAK BEAM INTENSITY| 66,000 candela| 11,300 candela
DISTANCE|

514 meters

|

213 meters

CONSTRUCTION|

Aluminum

FINISH|

Hard Anodized (MIL-A-8625 Type III, Class 2)

WEIGHT (w/batteries)|

4.0 oz (113 g)

LENGTH|

3.6 in (9.1 cm)

BEZEL DIAMETER|

1.125 in (2.9 cm)

BATTERIES|

Two 123A lithium (incl.)

SWITCHING|

Ambidextrous push/toggle

LIQUID INGRESS PROTECTION|

IPX4, Resistant to water splashes from any direction

THESE COMMODITIES, AND/OR SOFTWARE ARE SUBJECT TO EXPORT CONTROLS ADMINISTERED BY THE U.S. GOVERNMENT.
EXPORT AND/OR RELEASE TO FOREIGN ENTITIES MUST COMPLY WITH THE APPROPRIATE U.S. GOVERNMENT REGULATIONS.
All performance claims tested to ANSI/NEMA FL1-2019 Standard.
Green laser operating temperature range: -20°C to 60°C. Red laser operating temperature range: 0°C to 60°C.

BEFORE INITIAL USE, REMOVE BATTERY INSULATOR

KIT CONTENTS:

• X400 WeaponLight
• Battery Cover
• Laser Certification Label
• Universal Cross Member (marked “U,” installed)
• Picatinny Cross Member (marked “P”)
• 5/64-inch Hex Wrench
• One Set (2 each) Nylok® Replacement Screws
• Two 123A Batteries

BATTERY INSTALLATION/REPLACEMENT

Warning
Use of substandard batteries can cause injury or property damage. Visit www.surefire.com/batterysafety.

1. Attach Battery Cover (Figure 1).

2. Insert 123A batteries with terminals oriented as shown on inside of Battery Cover (Figure 3).

3. Close Battery Cover until compartment latch clicks, locking cover in place.

4. To replace batteries, depress latch (Figure 2) to open Battery Cover and remove and properly dispose of depleted batteries.
   Note: X400 must be removed from weapon prior to replacing batteries. Laser calibration should be verified every time X400 is removed from host weapon.

5. Install new SureFire 123A batteries and close Battery Cover until compartment latch clicks, locking cover in place.

CAUTION: Mixing a depleted battery with a new battery can cause damage to the weaponlight. Always use two fresh batteries when replacing old ones.

MOUNTING X400 TO WEAPON

Warning
ALWAYS confirm weapon is unloaded and on SAFE before attempting installation.
X400 ships with the Universal (marked “U”) Cross Member installed. To attach X400 to a Universal accessory rail, skip ahead to Attaching X400 to Accessory Rail instructions. To attach X400 to a Picatinny rail, the Universal Cross Member must be replaced with the included Picatinny Cross Member (marked “P”). Proceed to INSTALLING/REPLACING CROSS MEMBER above.
INSTALLING/REPLACING CROSS MEMBER

1. Loosen Rail-Adjustment Bolt by turning counterclockwise until Crossmember is fully exposed (Figure 4).
2. Remove Cross Member by lifting it out; store in a safe place for future use.
3. Place Cross Member into slot, ensuring that the Cross Member’s front edge is facing forward (toward bezel) and “wedge” is facing rearward.
4. Push Cross Member all the way forward and, while holding Cross Member in place, tighten Rail-Adjustment Bolt by turning clockwise until movable Rail Guide overlaps Cross Member “wedge,” locking it securely in place.

ATTACHING TO HOST WEAPON RAIL
Note: The appropriate Cross Member MUST be installed (“U” for Universal rails; “P” for Picatinny rails) to attach X400 to a weapon’s accessory rail. Some pistols with a MIL-STD-1913 rail may require the cross member to properly interface with the location of the front trigger guard surface.

1. Adjust gap between stationary and movable Rail Guides by turning Rail-Adjustment Bolt (Figure 6) clockwise or counterclockwise until gap is sufficiently wide to fit over weapon accessory rail (Figure 5).
2. Align Fixed Rail with weapon’s accessory rail and hinge X400 over the cross slot of host weapon
3. Mate Cross Member with corresponding slot in weapon’s accessory rail.
4. Secure by turning Rail Adjustment bolt clockwise.
5. Using a torque wrench, tighten to 6in-lb when mounting to a polymer rail, and 8-9in-lb when mounting to a metal rail. If a torque wrench is not available, tighten until snug and then apply an additional 1/4 turn.
   Do NOT overtighten! The bolt will break if excessive force is applied with a tool.

X400 OPERATION
MODE SWITCHING
X400 has four different modes of operation, including two separate disable positions, which are selected by rotating the Mode-Selector Switch, located behind the laser housing (Figure 7).
to the desired position. Modes include (Figure 9):

• Light only
• Laser only
• Light and laser together
• Disable (2 positions)

LIGHT OPERATION
For momentary-on operation, press and hold either the right or left side of tailcap toggle switch; release to deactivate (Figure 8).
For constant-on operation, rotate tailcap toggle switch up or down; rotate in the opposite direction to deactivate light (Figure 8).
Note: Remote switches are available for theX400.
Visit www.surefire.com/parts- accessories/switches.html ZEROING/ADJUSTING THE LASER
SureFire recommends zeroing the laser sight at a distance of 25 yards, against a target, to coincide with point-of-aim of the host weapon’s factory sights. Any discrepancy in point-of-aim (POA) versus point-of-impact (POI) at target distances between 10 and 25 yards is negligible. Laser sight may require re- zeroing after the first 10 rounds, as the adjustment apparatus may settle into position.

1. While acquiring target with host weapon sights at the desired range, determine which direction(s) laser needs to be adjusted for red or green dot’s position to match weapon’s POA.

2. Make the necessary adjustments, using the included 5/64-inch Hex Wrench to tighten or loosen Windage and/or Elevation adjustment screws (Figure 7) per instructions below, based on mounting position (from shooter’s perspective) and red or green dot’s relation to weapon’s POA.
   If X400 is mounted at 6 o’clock position and laser dot appears…
   a. …left of POA, loosen Windage screw by turning counterclockwise.
   b. …right of POA, tighten Windage screw by turning clockwise.
   c. …above POA, tighten Elevation screw by turning clockwise.
   d. …below POA, loosen Elevation screw by turning counterclockwise.
   If X400 is mounted at 3 o’clock position (long guns only) and laser dot appears…
   a. …left of POA, tighten Elevation screw by turning clockwise.
   b. …right of POA, loosen Elevation screw by turning counterclockwise.
   c. …above POA, tighten Windage screw by turning clockwise.
   d. …below POA, loosen Windage screw by turning counterclockwise.
   If X400 is mounted at 9 o’clock position (long guns only) and laser dot appears…
   a. …left of POA, loosen Elevation screw by turning counterclockwise.
   b. …right of POA, tighten Elevation screw by turning clockwise.
   c. …above POA, loosen Windage screw by turning counterclockwise.
   d. …below POA, tighten Windage screw by turning clockwise.

3. Once adjustments have been made, use laser to sight target from the designated range and fire several rounds, taking care to steady your aim to minimize any shooter error. Note: point-of-aim in relation to weapon’s point-of-impact and make any necessary adjustments. Retest and continue to make any adjustments until laser’s point-of-aim and weapon’s point-of-impact match.

4. If adjustments are made frequently, Windage and Elevation adjustment screws may need to be replaced. To replace, unscrew and remove existing screws with included Hex Wrench, then screw in included Nylok® Replacement Screws, and re-zero laser per previous instructions.

MAINTENANCE

To avoid any spots or diffusion of the laser-sight beam, periodically wipe the laser window clean with a soft, lint-free cloth to remove any residue or debris. Also, regularly blow any loose particles off of the window, then rub the surface with a #2 pencil eraser until all residue is removed. wipe clean with a soft, dry cloth.

BATTERY INFORMATION & WARNINGS

For complete battery information and warnings, reference the enclosed BATTERY INFORMATION / WARNING insert in your illumination tool’s original packaging or visit www.surefire.com/batteries.

ACCESSORIES

SureFire offers accessories for most of its illumination tools.
For a complete listing, visit www.surefire.com/parts- accessories.html.
LASER SAFETY
A laser produces a very narrow beam of light, which may cause physical harm to a person.
Subsequently, all lasers are regulated by the Food & Drug Administration (FDA). Lasers are classified by the intensity of the light they emit. Operational safety requirements are set by the (FDA) and the Center for Devices & Radiological Health (CDRH) in accordance with  the potential hazard to the user. Always follow the following guidelines:

1. Never look directly into laser beam or stare at it at close range.
2. Never shine laser beam in a person’s eye.
3. Do not direct the laser beam at anyone operating a vehicle, boat, or aircraft, as a laser beam appears very bright (especially at night) in a person’s eyes, even at great distances.
4. Be aware that the laser beam can be reflected off of mirrors or shiny surfaces.
5. Use the laser sight only for its intended purpose.

MISUSE OR FAILURE TO EXERCISE CAUTION WHEN OPERATING THIS LASER COULD RESULT IN EYE DAMAGE AND/OR ACCIDENTS. THE SUREFIRE NO-HASSLE GUARANTEE
We’ll do what it takes to keep your SureFire gear running smoothly.
SureFire warrants that if you — our customer — purchase one of our products, and we determine that it is defective in material and/or workmanship during your lifetime, we will repair or replace it — no hassle!
Our warranty does not cover consumables or normal wear-and-tear — things like batteries draining, headbands and headpads wearing out, ink cartridges running out, and switches wearing out — or damage resulting from abuse, alterations, unauthorized repairs, or use contrary to SureFire’s user manuals.
Should you need a replacement product, SureFire reserves the right to replace an obsolete product with a current production, like model. In the event that any issue with a SureFire product is not covered under this warranty SureFire can arrange to have the product repaired for a reasonable fee.

STANDARD DISCLAIMER

Except as specified above or prohibited by applicable law: all express or implied conditions and warranties, including, without limitation, any implied warranty or condition of merchantability or fitness for a particular purpose, or accuracy of any informational content, are hereby excluded and disclaimed by SureFire; and in no event will SureFire be liable for any special, direct, indirect, consequential, incidental or punitive damages howsoever arising and regardless of the theory of liability, even if advised of the possibility of such damages. Products, prices, availability, specifications, and offers are subject to change or cancellation at any time without notice.

WARRANTY CLAIMS

For claims, contact Customer Service at 714-545-9444 to obtain a Return Merchandise Authorization number (RMA#). Then package the unit carefully and send to (no CODs):

SureFire, LLC.
Repairs Department, RMA#____
17680 Newhope Street, Suite B
Fountain Valley, CA 92708
SureFire will pay any reasonable shipping costs to return the unit to you.
Revision C 9-2022
71-01-1140
X400T-A-GN, X400T-A-RD
X400U-A-GN, X400U-A-RD
18300 MT. BALDY CIRCLE
FOUNTAIN VALLEY, CA 92708-6122
WWW.SUREFIRE.COM
Patents: 7310903

References

• SureFire
• Product - Parts & Accessories - Batteries - SureFire

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