The Modlite OKW is a rifle weapon light head optimized for throw — the ability to push a tight, intense beam of light to distances that match the effective engagement range of a fighting rifle. Where most weapon-mounted lights prioritize broad flood for room-scale work, the OKW concentrates its output into a hot center beam with exceptional candela, making it the natural choice for rifles built to reach past 100 meters and out to 200 or beyond. This matters because a rifle light is not just for clearing hallways — it must positively identify threats at the same distances your optic, ammunition, and barrel are capable of engaging.
Output and Specifications
The OKW head is available in two generations. The original OKW produces 680 lumens and 56,000 candela. The updated OKWv2 raises that to 1,300 lumens and 95,000 candela, placing it among the highest-candela options available in a Scout-footprint rifle light. The distinction between lumens and candela is critical here: lumens measure total light output, while candela measures the intensity of the beam at its peak point. A light can produce modest lumens but extremely high candela by concentrating nearly all its output into a narrow beam. That is exactly what the OKW does.
The driver electronics are fully potted, meaning they are encased in a resin compound that protects them from shock. This is not cosmetic — potted drivers are tested and validated to survive select-fire recoil on the FN SCAR 17, one of the most punishing recoil environments for weapon-mounted accessories. Electronics validated against full-auto SCAR 17 recoil are well in excess of the recoil impulse generated by a civilian AR-15 or bolt-action rifle. This durability standard is shared with the PLHv2 head and is one of the reasons Modlite heads appear consistently on serious fighting rifle builds.
Battery Body Options
The OKW head is compatible with both the 18350 and 18650 Modlite battery bodies. The choice of body affects runtime and overall length but not the peak output of the head. The 18350 body is shorter and lighter, making it the preferred option for compact carbines and builds where rail space is at a premium. The 18650 body is longer but carries a larger cell, extending runtime — a meaningful consideration for sustained operations, night patrols, or any scenario where you cannot easily swap batteries.
On a precision or designated marksman rifle build — such as the FN SCAR 17S configurations documented in T.REX builds — the 18350 small body paired with the OKW head delivers sufficient candela to illuminate targets at 200 meters effectively. This makes the compact body a viable option even on longer-range platforms, though users who anticipate extended use should weigh the runtime trade-off carefully.
When to Choose OKW vs PLHv2
The OKW and PLHv2 represent two deliberate design philosophies within the same ecosystem. The PLHv2 trades some candela for a wider, more usable spill beam — better for close-range target identification, room work, and general-purpose illumination. The OKW sacrifices that peripheral spill to concentrate everything into a pencil beam that reaches much farther.
The practical decision framework is straightforward: match the light to the rifle’s intended engagement distance.
- OKW — Rifles built for 100–200+ meter engagements. DMR builds, 14.5” and 16” carbines with magnified optics or LPVOs, precision platforms like the SCAR 17S 16”, and any rifle whose primary role involves reaching across open ground or identifying threats at distance.
- PLHv2 — General-purpose carbines, home defense rifles, and builds primarily intended for sub-100-meter work where spill illumination helps you process a wider scene.
Users running an LPVO on a 14.5” build may find the OKW a better match than the PLHv2, since the purpose of the magnified optic is to extend effective engagement range — and the light should extend with it. A rifle capable of identifying and hitting targets at 300 meters through its optic but limited to illuminating 75 meters has a critical capability gap.
Switch and Mounting Integration
On documented builds, the OKW is paired with a SureFire DS00 tailcap switch and Modlite ModButton Slim pressure pad for deliberate activation. This configuration separates white light activation from any IR laser controls, preventing confusion under stress — a critical concern on rifles that also run aiming lasers for night vision operations. The DS00 provides a constant-on tailcap option as a backup if the pressure pad fails or is damaged.
Mounting the OKW follows standard Scout-pattern conventions. The Arisaka Inline and Offset mounts and the T.REX Lightbar are common solutions for positioning the head at the appropriate height and cant on the handguard, keeping it tight to the rail while leaving clearance for laser housings and other accessories. Proper mounting and offset placement prevents the light body from creating shadows off the muzzle device or suppressor.
Role in the Broader Loadout
A throw-optimized rifle light becomes especially relevant when considering the rifle as part of a coherent loadout. Positive identification is not optional — it is a legal and moral prerequisite to employing lethal force, and the law of self-defense demands that you confirm what you are shooting at. At 150 meters in low light, without a capable weapon light, you cannot do this. The OKW exists to close that gap.
For users who also carry a handheld EDC flashlight or run a pistol weapon light, the OKW fills a completely different role. Handheld and pistol lights are close-range identification tools. The OKW is a rifle-distance identification tool. They complement rather than overlap.
Products mentioned
- Modlite Rifle Light – 18350 — OKW or PLHv2 head with compact 18350 battery body
- Modlite Rifle Light – 18650 — OKW or PLHv2 head with extended-runtime 18650 battery body
- T.REX Lightbar Mount — Scout-pattern light mount for rifles