The AN/PEQ-15 — formally designated the ATPIAL (Advanced Target Pointer/Illuminator/Aiming Laser) — is the standard-issue infrared laser aiming device for the U.S. military and the single best-value full-power laser system a civilian night-vision shooter can acquire. Manufactured by L3Harris, it combines an IR aiming laser, an IR illuminator, and a visible aiming laser in a single housing, making it the foundational tool for accurate rifle engagement under night vision. Understanding what the PEQ-15 does, how it differs from civilian-class devices, and how it integrates into a rifle system is essential for anyone building toward an NVG-enabled rifle setup.
What the PEQ-15 Does
The PEQ-15 outputs a laser in the near-infrared spectrum that is invisible to the naked eye but clearly visible through image intensifier tubes such as the PVS-14. Its IR illuminator can be focused from a wide flood to a tight beam, providing supplemental illumination that allows the shooter to positively identify targets in low-ambient conditions. The visible laser mode is a secondary feature — practically, the IR laser and IR illuminator are what make the device relevant.
The critical advantage of a full-power PEQ-15 over civilian-class lasers is output. Under conditions with significant ambient IR light — street lights, a full moon, IR flares, or even an adversary’s IR illumination — civilian-class devices like the AT PLC or D-Ball A3 wash out beyond roughly 150 meters. The full-power PEQ-15’s illuminator can punch through these conditions and remain usable at extended ranges. This distinction is not academic; it determines whether a shooter can positively identify and accurately engage targets in contested low-light environments versus only being effective in total darkness within a hundred meters.
Full-Power vs. Civilian-Class Variants
The PEQ-15 exists in two functionally different categories:
- Full-power (military-issue): High-output IR laser and illuminator. Not commercially available to civilians through normal retail channels due to FDA power restrictions. Units on the civilian market have almost certainly originated from DoD sources through gray-market channels — surplus, private sales, or other unofficial avenues. They cannot be returned to L3Harris for warranty service or repair.
- Civilian-class (C-class): Commercially available and FDA-compliant, but with significantly reduced IR laser output. Testing has shown that a civilian-class PEQ-15 cannot defeat even a full-size Streamlight handheld flashlight aimed back at the shooter at 20 meters under night vision. This limitation makes the C-class variant a poor choice for anyone serious about night-vision capability.
Used full-power PEQ-15s typically sell in the $1,500–$2,200 range depending on condition. A fully functional unit at approximately $2,000 represents the recommended purchase for maximum capability per dollar in the IR laser category. However, gray-market purchases carry real risk: illuminators may have degraded from extended field use, and there is no recourse if a unit arrives defective. One documented loss was approximately $1,600 on a gray-market PEQ-15 whose illuminator had failed with no possibility of warranty repair.
The LA-5 and LA-5 UHP
The LA-5 is the PEQ-15’s successor in the L3Harris product line, offering a more compact form factor and improved controls. The LA-5 UHP (Ultra High Power) variant is issued to SOCOM units and outputs even more IR power than the standard LA-5 or PEQ-15. Like the full-power PEQ-15, the LA-5 UHP is not commercially available through normal channels and shares the same gray-market acquisition challenges.
Both the PEQ-15 and LA-5 run on a single CR123A lithium battery — the same cell that powers EOTech holographic sights and SureFire weapon lights. This standardization means an operator whose rifle carries an optic, a laser, and a white light can sustain all three electronic systems from a single battery stock, a significant logistical advantage for building a coherent loadout.
Mounting and Integration
Rail Placement
Mount the PEQ-15 as far forward on the handguard as possible. This minimizes “rail splash” — the laser reflecting off the handguard, weapon light body, or the shooter’s own support hand during a C-clamp grip. Forward placement keeps the IR beam clear of obstructions and allows the illuminator to project without interference.
Interaction with Iron Sights
Traditional PEQ-15 units have laser diodes spaced far enough apart to clear a Daniel Defense fixed front sight post when the laser is mounted forward of the sight. However, newer compact lasers like the NGAL and Wilcox RAID Xe have tighter profiles and cannot clear a front sight post, requiring the iron sight to be repositioned behind the laser. When running a DBAL-style laser, a common mistake is mounting the front sight post too close in front of the unit, blocking access to the battery compartment at the front. Experienced night-vision operators position front sights behind the laser with sufficient spacing to allow both control access and easy battery removal.
Interaction with Optic Height
On compact platforms like the MK18, a forward-mounted PEQ-15 or LA-5 can intrude into the bottom of the sight picture depending on optic height. An EXPS3 at lower-third co-witness introduces less of the laser body into the field of view compared to an XPS3 at absolute co-witness. Shooters should account for laser placement and optic mount height together when configuring their rifle, particularly on shorter-barreled platforms where rail real estate is limited.
Zeroing
The PEQ-15 has separate windage and elevation adjustments for both the IR laser and the visible laser, accessible via slotted screws on the front face of the unit. Zeroing is performed at a known distance — typically 50 meters for IR lasers — under night vision, with the shooter confirming that the IR laser dot coincides with the point of aim through their optic. The visible laser can be zeroed independently as a backup reference but is rarely used operationally. Because the laser emitter sits offset from the bore axis (typically above and to the right), the zero is only precise at the zeroed distance; at closer or farther distances, the offset introduces a measurable point-of-impact shift. Experienced shooters internalize this offset rather than attempting to compensate mechanically.
Practical Considerations for Civilian Shooters
The PEQ-15 is not a substitute for a quality white light. In the Trex Arms framework, a weapon-mounted white light remains the first priority on any fighting rifle. The IR laser is a capability layer added after the fundamentals — a reliable rifle, a zeroed optic, a white light, and the ability to shoot well under passive aiming — are already in place. Buying a PEQ-15 before owning night-vision devices to use with it is putting the cart before the horse.
For shooters who already run a PVS-14 and want to move from passive aiming to active aiming, the full-power PEQ-15 remains the most cost-effective entry point. It is a proven, combat-tested system with decades of operational feedback behind its design. Its ergonomics are dated compared to the NGAL or MAWL, and its form factor is bulkier than the LA-5, but none of those drawbacks change its fundamental capability: it puts an IR laser and a usable illuminator on the rifle at a price point hundreds or thousands of dollars below its successors.
Summary
The PEQ-15 is the baseline recommendation for a full-power IR laser aiming device. Its combination of IR laser, IR illuminator, and visible laser in a single CR123A-powered package — available on the gray market for roughly $2,000 — makes it the entry standard against which all other aiming lasers are measured. Civilian-class variants should be avoided due to their inability to perform under anything other than ideal darkness. Shooters acquiring a PEQ-15 should buy from reputable sources, inspect illuminator function immediately upon receipt, and understand that no warranty support exists for these units. Properly mounted, zeroed, and paired with quality night vision, the PEQ-15 transforms a standard fighting rifle into a platform capable of accurate engagement in near-zero-light conditions.