Mk4 Battle Light

Weapon-Mounted White Light LED

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The modular design of the 500 lumen Mk4 weapon light provides interchangeable switch options to meet a wide variety of battlefield needs. The low-profile design places the light close to the weapon body nearly eliminating the rifle barrel shadow and enhancing weapon handling switchology. The Mk4 can operate on two CR 123A batteries or one rechargeable Li-Ion battery (sold separately).



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Product Features: 
  • Push-button or Remote Cable Pressure Pad Activation
  • Momentary / Constant On
  • Includes Low-Profile Thumb Screw Mount and Pressure Pad
  • White Light LED
  • Powered by: Two CR 123A Batteries
  • Remote Cable Port


Item No.TypePowerSpecial FeatureLamp
9072White Light500 LumensDual purpose tailcap and remote pressure pad White Light LED
Special FeatureDual purpose tailcap and remote pressure pad
LampWhite Light LED
Beam Divergence10°
*Range300 m
BatteryCR 123A
Battery Life (mode dependent)≥1.25 Hours
Reflection LensTotal Internal Reflection Lens
Warranty2 Year
MaterialAircraft Aluminum
Weight (with battery and mount)4.9 oz.
Dimensions6.04 (L)
Temperature Range-40° to +65°
WaterproofSubmersible to 5 m
MountMIL-STD-1913/Picatinny rail
Activation SwitchIntegrated Push Button
Remote Cable Pressure PadOptional
Special FeaturesComes with 1913 mount, Optional Y-cable connects Mk4 to DBAL-A3 Laser

Mk4 Battle Light is rated 4.0 out of 5 by 1.
Rated 4 out of 5 by from Great light for AR-15 -- not for the Steyr AUG I had no problem installing the light onto the AR-15 with its full length picatinny rail. I thought the supplied velcro was a poor way of attaching the pressure switch, so purchased the Magpul M-LOK Insight PEQ Tape Switch Mounting Plate, Part #: MAG631-BLK to attach the pressure switch to the handguard and it fit perfectly. The light appears to be of high quality so I purchased a second MK4 light for the Steyr AUG and found the rather large bolt used to attach the MK4 light onto the AUG's secondary picatinny rail was too large to mount the light. The bolt interferes with the primary picatinny rail, so my options are to either: - Remove the primary picatinny rail to gain clearance in order to install the light onto the secondary rail and then re-install the primary rail once the light has been installed - Locate a screw that does not have such a large bolt head - Purchase the PuP light mount kit which attaches to the AUG's gas block Have contacted Steiner Tech Support, they didn't have any suggestions re: mounting the pressure pad, (aside from adding more velcro) and they do not offer a screw with a smaller head so am disappointed with their support of the product.
Date published: 2021-01-02
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Is there a different pressure switch I can use with the mk4 

Asked by: Adam75
Yes any Steiner pressure switch will work with the battle lights.
Answered by: Steiner Tech Support
Date published: 2021-03-24

I have a Mk4 Battle Light with the tailcap that has a push button and connection port for a remote switch. Since I usually don't use a remote switch, I was wondering if there is a little plug sold to keep debris out of the remote switch port. Thank you.

Asked by: 65k10
We do not have a plug for that.
Answered by: TeamSteiner
Date published: 2021-02-03

Hey,  When/if the LED(s) die can you seperately replace them? And if so can you direct me to where I can get replacement LEDs.  Regards LCPL R.Soested Danish Army Electronic Element 

Asked by: Rune
The battle light has a 3 year warranty that will cover LED malfunction.
Answered by: SteinerCustomerService
Date published: 2016-12-13

How far will the mk4 light illuminate?

Asked by: Big Red
300 meters
Answered by: Steiner Tech Support
Date published: 2020-09-09

I lost the remote pressure pad for my MK4 Battle Light. Can I purchase just the pressure pad?

Asked by: Ranger173
#9120 is the remote cable with right-angle connector #9121 is the remote cable with straight connector
Answered by: SteinerOptics3
Date published: 2018-05-23

What other batteries work with the mk4 and is there another pressure switch that will work with it also having allot of problems with the one that came with it 

Asked by: Glockdose
As for batteries, just the CR123's. For the pressure switch, shoot us an email to and we will send you a replacement pressure switch.
Answered by: Steiner Tech Support
Date published: 2020-09-09

Can the mk4 pressure switch be mounted to a 1913 picatinny rail I've had bad luck with hook&loop two sided tape and zip ties I like to keep my wires clean and snag free

Asked by: snowman49017
The MK4 pressure switch is a stick on hook and loop pressure switch. We do not offer a hard mount for the pressure switch onto a rail.
Answered by: Steiner eOptics 1
Date published: 2017-12-28

Does the Mk4 Battlelight work with the visible override feature of the DBAL-A3? If so, how do you connect it, and what does it do?

Asked by: veritas16
If you already have an A3 all you'll need is a "Y" remote cable in one end of the A3 override port, and the other in the MK4. When the paddle switch is activated both the A3 visible and MK4 LED will turn on.
Answered by: Steiner Tech Support
Date published: 2020-03-14
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