Fenix Pressure Switches Compared: Which Remote Switch Fits Your Weapon Light?
A remote pressure switch lets you activate a weapon-mounted light without breaking your grip to reach the tailcap — squeeze the pad for momentary light, or use the main switch for constant-on. Fenix makes five active pressure switches, and they're not interchangeable: each is built for a specific connection type, cable length, and set of compatible lights. Two of them are also sold as bundled kits with the rail mount included, at a lower combined price than buying separately. Here's how they actually differ, so you order the right one the first time.
Quick Comparison
| Switch | Price | Connection | Compatible With | Best For |
|---|---|---|---|---|
| AER-02 V2 | $19.95 | Coiled cable, AR-pattern mount | Most AER-compatible lights (via ALG-05 mount) | Law enforcement & SWAT — IP68 waterproof, anti-glare |
| AER-03 V2 | $19.95 | Short PU cable, AR-pattern mount | Most AER-compatible lights (via ALG-05 mount) | Stealth use — silent, anti-tangle pad |
| AER-04 | $19.95 | 9 in. PU cable, ALG-05 mount | 1.1" tail diameter, 21700 lights: TK30, TK22 V2.0, TK22 UE, HT18 | Larger-body 21700 weapon lights |
| AER-05 | $19.95 | 9 in. PU cable, ALG-05 mount | APF-circuit 21700 lights: TK16 V2.0, TK28 TAC, PD36 TAC | APF-circuit tactical lights specifically |
| AER-06S | $39.95 | Direct USB-C plug-in, no cable | GL19R only (original version — not GL19R V2.0) | GL19R owners who want a low-profile, cable-free setup |
| AER-02 V2.0 + ALG-05 Kit | $29.95 | Switch + mount bundled | TK15, TK22, TK15UE, TK09, TK11 TAC, PD35 V2.0, PD35 TAC, PD32, UC35, FD41, FD30 | First-time buyers of a compatible light — skips buying the mount separately |
| AER-03 V2.0 + ALG-05 Kit | $29.95 | Switch + mount bundled | Most AER-compatible lights | First-time buyers who want the silent switch and mount together |
AER-02 V2 Tactical Remote Pressure Switch — $19.95
The Fenix AER-02 V2 is built for AR-pattern rifles, with a compact, non-coiled, shorter cable than earlier designs and an all-black, anti-glare finish. It's IP68 waterproof, which matters if you're carrying in wet conditions or need gear that holds up to repeated field use — a detail that makes it a common pick for law enforcement and SWAT teams specifically. The main circle switch works like a standard tailcap switch (on/off), while the pressure pad gives you a momentary "half-press" for quick, controlled bursts of light rather than full activation. It's built to fit the TK15, TK22, TK15UE, TK09, TK11 TAC, PD35 V2.0, PD35 TAC, PD32, UC35, FD41, and FD30.
AER-03 V2 Tactical Remote Pressure Switch — $19.95
The Fenix AER-03 V2 is machined from T6-grade aluminum, with a PU cable shorter than the previous generation to reduce tangling during movement, and IP68 water resistance for reliability in wet conditions. What sets it apart is the instant-on pressure pad, engineered to activate silently — a specific advantage if you need to control a weapon light without giving away your position audibly. It also adds mode/output selection on select compatible lights, not just on/off.
Buy as a Kit and Skip the Separate Mount
Both the AER-02 V2 and AER-03 V2 are also sold as tactical kits that bundle the switch with the ALG-05 rail mount, at $29.95 — about $5 less than buying the switch and mount separately ($19.95 + $14.95 = $34.90). The AER-02 V2.0 + ALG-05 Tactical Kit is the more budget-friendly, high-volume option, popular in hunting and law enforcement use and matched to the TK15, TK22, TK15UE, TK09, TK11 TAC, PD35 V2.0, PD35 TAC, PD32, UC35, FD41, and FD30. The AER-03 V2.0 + ALG-05 Tactical Kit pairs the silent switch with the same mount for a comparable savings. If you don't already own an ALG-05 mount, buying the kit is the more cost-effective route for either switch — the AER-04 and AER-05 are currently only sold as standalone switches, with the mount purchased separately.
AER-04 Tactical Remote Switch — $19.95
The Fenix AER-04 is sized for larger-body lights: it's built for a 1.1-inch tail diameter and 21700-battery platforms, specifically the Fenix TK30, TK22 V2.0, TK22 UE, and HT18. Its 9-inch, high-elastic PU cable fits most gun barrels, and the dual switch panel lets you choose between momentary-on and constant-on illumination. If you're running one of those four lights, this is the switch built to match — the AER-02/03 pair is sized for different host lights.
AER-05 Remote Pressure Switch — $19.95
The Fenix AER-05 looks similar to the AER-04 on paper — same 9-inch PU cable, same dual switch panel — but it's built specifically for Fenix's APF-circuit lights: the TK16 V2.0, TK28 TAC, and PD36 TAC, all powered by 21700 batteries. APF-circuit lights use different internal switching than the standard AER-04-compatible models, which is why Fenix makes these as two separate products rather than one universal switch.
AER-06S Tactical Remote Pressure Switch — $39.95
The Fenix AER-06S is the odd one out on this list — it's not a universal accessory, it's a dedicated match for the original Fenix GL19R weapon light (it does not work with the GL19R V2.0). Instead of a coiled cable, it plugs directly into the GL19R's USB-C port, which eliminates a cable to snag or route and keeps the whole setup low-profile — just 28mm, so it won't interfere with your sight picture regardless of where you mount it. It ships with two base options (MIL-STD-1913 or M-LOK), a 45-degree angled button for use at multiple grip positions, and a built-in slot to store the cable when it's not mounted. If you own a GL19R, this is the only pressure switch designed for it.
Mounting: The ALG-05 Rail Mount
The AER-02 V2, AER-03 V2, AER-04, and AER-05 all attach to a weapon rail through the same accessory: the Fenix ALG-05 mount ($14.95), a hard-anodized aluminum-alloy clamp that snaps onto any standard Picatinny rail. For the AER-02 V2 and AER-03 V2, it's more cost-effective to buy the switch and mount together as one of the kits above rather than separately. The AER-04 and AER-05 don't currently have a kit option, so the mount is purchased on its own for those two. The AER-06S is the exception across the board — its two rail bases are included with the switch.
Frequently Asked Questions
Q: What does a pressure switch do that the tailcap switch doesn't?
A: It moves the on/off control to your support hand or rail, so you can activate the light without shifting your primary grip to reach the tailcap. Most Fenix pressure switches also add a momentary "half-press" mode for brief, controlled bursts of light that a standard tailcap switch can't replicate.
Q: How do I know which Fenix pressure switch fits my light?
A: Check your light's model against the compatibility notes above — AER-04 and AER-05 are matched to specific model lists (not interchangeable with each other despite looking similar), and the AER-06S only works with the original GL19R. If your light isn't listed under any of the five, it likely doesn't have a compatible Fenix remote switch.
Q: Do I need to buy a mount separately?
A: For the AER-02 V2 and AER-03 V2, no — both are sold as kits that bundle the ALG-05 mount in at a lower combined price than buying separately. For the AER-04 and AER-05, yes, the ALG-05 is purchased on its own. The AER-06S includes its own mounting bases and doesn't need the ALG-05 at all.
Q: Are Fenix pressure switches waterproof?
A: The AER-02 V2 and AER-03 V2 are both IP68 rated. Fenix's other switches are built for outdoor and duty use, but check the individual product listing before treating any of them as submersible.
Browse the full Fenix pressure switch collection to compare current options and mounts.
