The Holosun LS321 is a Chinese-American multi-function tactical laser designator, designed and marketed by Holosun Technologies. It simultaneously integrates a visible laser (red or green depending on the version), an infrared (IR) laser and an infrared illuminator, all in a compact 7075-T6 aluminum housing. Aimed at special forces, SWAT units and civilian snipers equipped with night vision devices, the LS321 represents one of the most accessible multi-laser solutions on the professional market.
History and Development of the Holosun LS321
Holosun Technologies was founded in 2013 in California, with production based in China. The brand quickly established itself by offering professional-grade optics and tactical accessories at competitive prices. The LS321 is part of the 300/LS series of laser designators, designed to compete directly with high-end military systems like the DBAL or MAWL, at a fraction of the cost. It comes in two main variants: the LS321G (visible green laser) and the LS321R (visible red laser), both of which share the same IR laser and IR illuminator.
The development of the LS321 responds to a growing need in the civilian and law enforcement market: to have a reliable coaxial laser system, capable of operating both day and night with night vision goggles (NVG), while remaining affordable and robust. Its coaxial design — the three beams are aligned on the same optical axis — allows a single winding/elevation adjustment for all three systems simultaneously, greatly simplifying battery setup in the field.
Technical Specifications
| Feature | Specification |
|---|---|
| Designation | Holosun LS321 (LS321G / LS321R) |
| Manufacturer | Holosun Technologies (USA/China) |
| Green (Class IIIa) or Red (Class IIIa) | visible laser |
| IR | Laser Class 2M infrared (coaxial) |
| Built-in IR illuminator | , adjustable in focus |
| Material housing | 7075-T6 aluminum, anodized MAO |
| Dimensions | 91 × 56 × 40 mm |
| Weight | 244 g (with battery) |
| 1× CR123A battery — up to 5,000 hours | |
| MIL-STD 1913 Picatinny Rail Mount (Integrated QD) | |
| IP67 | water resistance |
| Operating | Temperature-40°C to +51°C |
| W&E adjustment | 0.5 MOA per click — range ±50 MOA |
| remote control | / remote cable included |
Operation and Technical Particularities
The LS321 is based on a coaxial mounting principle: the three beams (visible laser, IR laser, IR illuminator) are physically aligned on the same optical plane. When the operator sets the zero using the winding and elevation screws, the three systems move together, ensuring perfect consistency between the visible point of impact (daytime use) and the IR point of impact (night use). A side mode selector allows you to choose between the different emission combinations. The IR illuminator has a separate focus wheel on the back of the unit, allowing you to switch from a collimated beam (long range) to a diffuse beam (wide area illumination). The integrated QD mount ensures a solid, backlash-free attachment to standard Picatinny rails, with the ability to quickly remove and rewind without zero loss.
Variants and Versions
The Holosun LS321 is available in two main variants. The LS321G is equipped with a green visible laser (wavelength ~520 nm), which is significantly more visible during the day than red, at the cost of slightly higher consumption. The LS321R uses a visible red laser, which is more energy-efficient and traditional in military use. Both versions strictly share the same class 2M IR laser and IR illuminator. Holosun has also produced versions with different integrated switches in different markets. Note: the LS321 in its original version has been discontinued by Holosun in favor of new models such as the LS321-GR (2025/2026), which combines a green laser and an IR red laser in an updated configuration.
Users and Areas of Application
The Holosun LS321 mainly targets three categories of users. Law enforcement and SWAT units adopt it for night operations in urban environments, where the combination of visible laser and IR allows for a smooth transition between modes of engagement. Civilian shooters who are passionate about night vision use it on AR-15 or AK platforms for night hunting or recreational shooting (in countries where legislation allows it). Finally, some specialized preparers and armories integrate it into complete equipment kits for private security forces. Its popularity is mainly due to its value for money: it offers features close to military systems such as the AN/PEQ-15 or the MAWL-C1 at a fraction of the price.
Civil Possession in Switzerland
In Switzerland, the Holosun LS321 is legally available for purchase for civilians in its visible laser version. In accordance with the Federal Weapons Act (Arms Act) and the Weapons Ordinance (Firearms Ordinance), class IIIa laser designators are regulated weapon accessories. Acquisition does not require a specific weapon license for the accessory itself, but its use on a firearm remains subject to the usual conditions of weapon ownership. IR versions (infrared laser class 2M or higher) may be subject to additional restrictions depending on use. It is recommended to inquire with the competent cantonal authority before purchase. Several specialized gunsmiths in French- and German-speaking Switzerland offer LS321 or its equivalents in stock or on order.
Conclusion
The Holosun LS321 has established itself as a benchmark in the segment of accessible multi-function laser designators. By combining visible laser, IR laser and IR illuminator in a rugged IP67 enclosure at a price much lower than military alternatives, it has democratized the use of coaxial laser systems for civilian shooters and law enforcement on a budget. Its successor, the LS321-GR, continues this philosophy with technical updates, confirming Holosun’s commitment to this niche tactical segment.
