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KIT CONTENTS:

• XC1 WeaponLight
• AAA, Rechargeable NiMH Battery

MOUNTING XC1 TO A HANDGUN

XC1’s rail-mount bolt should be sufficiently loose before sliding the 
XC1 onto the rail (Fig. 1). To further loosen, if needed, turn screw on 
rail-mount bolt counterclockwise with a 3/32” Allen wrench until 
there’s sufficient clearance to slide the XC1 onto the rail and over the 
cross member. Once properly positioned (looking through the indexing 
cutout) tighten screw (clockwise) so the bolt rises into the locking notch 
thereby securing the light to the firearm. 

NOTE: Minor centering of the XC1 onto the rail may be required for 
an optimum fit. The bolt interface requires only hand-tight tension 
and will not back out from recoil. Do not over-tighten.

REPLACING THE BATTERY

Confirm that your firearm is unloaded. Do not place hands in front of 
muzzle when replacing and installing the battery in your XC1-B.  Remove 
the battery cap by turning any of starred slots counterclockwise with 
coin or flathead/slot screwdriver (Fig. 2). Remove spent AAA battery 
and replace with a new AAA battery. Once new battery is in place with 
positive terminal facing outward, simply retighten the battery cap (by 
turning cap clockwise) and reinstall the XC1 onto the handgun (see 
above).

NOTE: AAA NiMH batteries are recommended for optimum output 
and runtime. AAA lithium and alkaline batteries can also be used 
but with less runtime.

ACTIVATING THE XC1

Your XC1 was designed to allow support-hand activation in both 
momentary-on and constant-on modes when firing right- or left-
handed (see Fig. 3). 

TOGGLE SWITCHING

Momentary-on activation Depress and hold either toggle switch for 
more than a tenth of a second or as long as needed to momentarily 
activate the XC1-B.  Release to turn off.

Constant-on activation with toggle switches:

 

The XC1-B is 

programmed for constant on activation by a quick tap and release 
action via either toggle switches. 

NOTE: The light will not activate when these rear switches are 
pushed upward or side-to-side. This intentional design-feature 
minimizes unintended activation when drawing or holstering.

SLIDE SWITCH ACTIVATION

Constant-on activation, with slide switch: Constant-on activation 
with toggle switches: The XC1-B is programmed for constant on 
activation by applying a quick tap and release action to either toggle 
switch.  Depress either toggle switch to turn off the light.

NOTE:  If the XC1-B is initially activated to constant on using the 
slide switch it can only be turned off by moving the slide switch 
to the OFF position. The toggle switches cannot override the slide 
switch when it is moved to the ON position.

MAINTENANCE

Use a clean, dry cloth to wipe off body and window. Periodically clean 

and lubricate threads. Apply a thin coat of non-migrating, silicon-based 

lubricant to battery cap o-ring (do not use petroleum-based lubricants 

which can harm O-rings). For additional tips on maintaining your SureFire 
illumination tool, visit www.surefire.com/faqs-maintenance.

ACCESSORIES

SureFire makes a full line of accessories for most of its illumination tools. 

For a complete listing, visit www.surefire.com/partsaccessories.

FIGURE 2

BATTERY CAP

AAA BATTERY

FIGURE 1

RAIL-MOUNT BOLT

RAIL-ADJUSTMENT

(CLOSED)

RAIL-ADJUSTMENT

(OPEN)

CROSS

MEMBER

RAIL-MOUNT 

BOLT

RAIL

CLAMPS

CONSTANT-ON

FIGURE 3

MOMENTARY & 

CONTANT-ON 

TOGGLE SWITCHES

OFF

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