Instruction Manual
TWM-852XL
Please read these instructions before using your Nightstick TWM-852XL. They
include important assembly and operating instructions.
PACKAGE CONTENTS
y 1 - Weapon Mounted Light – Long Gun Single Switch
y 2 - CR123 Lithium Batteries
y 2 - Inserts L1 and L2 (L2 is pre-installed)
y 2 - Cross Rail Mounting Cap Head Screws (1 pre-installed & 1 spare)
y 1 - Allen Wrench
WEAPON SAFETY
PLEASE BE SURE TO READ, UNDERSTAND AND FOLLOW THESE SAFETY
AND OPERATING INSTRUCTIONS WHEN HANDLING A FIREARM OR THE
NIGHTSTICK TWM WHEN MOUNTED ON A FIREARM. FAILURE TO DO SO CAN
BE DANGEROUS AND COULD RESULT IN SERIOUS INJURY, DAMAGE TO
PROPERTY, OR DEATH.
Use of a firearm under any circumstance is inherently dangerous. SERIOUS
INJURY OR EVEN DEATH may result without proper training in the safe handling of
firearms. Proper training should be obtained from an accredited firearms safety program
conducted by a qualified instructor.
Read, understand and follow all of the safety instructions that came with your firearm
before attaching your new TWM.
y Always assume every firearm is loaded and treat that firearm as such.
y Never point a firearm at anything that you are not willing to destroy.
y Never service your firearm or your TWM when mounted on a firearm without first
activating the weapon's safety (if applicable), removing the magazine, opening the
action and physically and visually inspecting to make sure that no ammunition is
installed in the firearm.
WEAPON MOUNTED LIGHT SAFETY
y Nightstick recommends that the TWM should only be activated with the non-trigger
hand (support hand) while employing a two-hand grip on the firearm and with the
trigger finger fully outside the trigger guard when applicable.
WARNING: FAILURE TO DO SO COULD RESULT IN AN ACCIDENTAL DISCHARGE
AND SERIOUS INJURY, DAMAGE TO PROPERTY, OR DEATH.
y Thoroughly practice (employing safe training conditions) with the TWM and an
unloaded firearm before using the weapon.
Bayco Products, Inc. • 640 South Sanden Blvd. • Wylie, TX 75098 • 1-800-233-2155 • 1-469-326-9400 • www.nightstick.com
BEFORE ATTACHING, INSPECTING OR SERVICING THE TWM
y Engage the safety on the firearm (if applicable).
y Remove the magazine from the firearm (if applicable).
y Open the action and visually and physically inspect the chamber to be sure it is empty.
y Keep the barrel pointed in a safe direction at all times and never place your hand in
front of the muzzle.
WARNING: IT IS IMPERATIVE THAT SAFETY MEASURES BE EMPLOYED AT ALL
TIMES WHILE HANDLING A FIREARM.
GENERAL SAFETY WARNINGS
y NOT FOR USE ABOVE HAZARDOUS LOCATIONS
y DO NOT use in explosive atmospheres, near flammable liquids, or where explosion
proof lamps are required.
y DO NOT use in the proximity of vehicles or equipment when there is a risk of
flammable liquids coming into contact with the flashlight.
y DO NOT expose the batteries to water or salt water, or allow the batteries to get wet.
y DO NOT store the batteries with metallic objects that may cause a short circuit.
y Immediately discontinue use of the batteries if they emit an unusual smell, feel hot,
change color, change shape or appear abnormal in any way.
y Keep out of the reach of children.
INSTALL BATTERIES
Image 1
y Open the Battery Door Screw using a Phillips head screwdriver. (Image 1)
y Insert the included CR123 Batteries using the battery orientation markings on the
side of the light. (Image 2)
y Re-install the Battery Door Screw until fully tightened. (Image 3)
INSTALL THE LIGHT ONTO YOUR FIREARM
The TWM is designed to be easily attached and detached from the firearm's tactical
rail. The firearm must have a tactical rail and it must have at least one cross rail slot. The
TWM is not designed to be used on a firearm that does not have a cross rail slot.
IMPORTANT: Your TWM comes pre-configured with the L2 modular channel-
locking insert. If the fit is not correct for your specific handgun model, use the
Allen wrench to switch to the L1 insert.
Image 4
y Push inward on the head of the rail clamp tension thumbscrew to fully open the
adjustable portion of the rail clamp. (Image 4)
y While making sure that your firearm is in a safe condition and that the barrel is pointed
in a safe direction, place the fixed portion of the rail clamp into the groove of the tactical
rail on your firearm and align the insert tab with the slot on your firearm.
y Rotate the TWM onto the tactical rail (Image 5). Release the pressure on the tension
thumbscrew making sure that the TWM is gripping both sides of the tactical rail of your
firearm. Verify that the insert tab is fully seated into the rail slot of the firearm. (Image 6)
INS-TWM-852XLG2-19
Image 2
Image 3
Image 5
Image 6