5KU SpitFire tracer for Sig Air M18 Tan

The 5KU SpitFire Tracer for SIG Air M18 Tan is an integrated tracer and compensator module for the SIG Air / VFC P320 M18 GBB airsoft replica. This model-specific version is mounted on the underside of the M18 frame and combines a compact compensator-style design with a powerful tracer and adjustable muzzle-flash simulation. This means you do not need a threaded outer barrel or a separate tracer adapter.

The built-in 5KU SpitFire with 5W High Power UV LED activates compatible tracer BBs and can simultaneously simulate a muzzle-flash effect. You can choose between Tracer + Muzzle Flash, Tracer Only or Muzzle Flash Only. The unit also features a built-in Li-ion battery with USB-C, Quick Charge, automatic standby and Shake Wake. This Tan version offers the same technical features as the Black M18 version, but its colour matches a tan/FDE P320 build better.

Tracer en muzzle-flash simulatie

The SpitFire combines tracer lighting and muzzle-flash simulation in a single compact module. The powerful UV LED activates fluorescent tracer BBs whilst firing, making the BBs’ trajectory clearly visible in dark conditions. Two additional light sources on the sides create the simulated muzzle-flash effect.

The adjustable modes allow you to decide for yourself how the unit is used. For purely functional use, you can switch on the tracer only, whilst the muzzle-flash function can be used either on its own or in conjunction with the tracer. The openings in the compensator housing ensure that the light effect around the front is clearly visible.

5W High Power UV LED en maximaal 35 RPS

The integrated tracer uses a 5W high-power UV LED and has a specified maximum processing speed of approximately 35 RPS, or around 2,100 BBs per minute. This enables the electronics to process rapidly successive tracer BBs.

To make effective use of the tracer effect, suitable fluorescent tracer BBs are required. Ordinary BBs can be fired as normal, but they do not glow under UV light.

Specifically for the SIG Air / VFC P320 M18

This version has been developed for the more compact SIG Air / VFC P320 M18 GBB. The shape and length of the compensator module are tailored to this platform, ensuring that, once fitted, the SpitFire blends in visually with the front of the replica.

A separate 5KU version is available for the longer P320 M17. Although both systems share many technical features, their model-specific construction and dimensions differ. You should therefore always choose the version that is actually intended for the M18.

QD-montage zonder threaded outer barrel

The SpitFire is attached to the underside of the M18 frame via the accessory rail. This means that a threaded outer barrel is not necessary and there is no need to fit a conventional tracer adapter to the barrel.

The Quick Detach system allows for relatively quick fitting and removal. The design is intended as a drop-in installation and does not normally require any permanent modification to the replica. After fitting, always check that the QD mechanism is fully locked before using the M18.

Aluminium Picatinny rail for accessories

As the original M18 accessory rail is used to mount the SpitFire, a 20mm / M1913 Picatinny interface has been fitted to the underside of the module. This section of the rail is made of aluminium.

This means it is still possible to mount a compatible weapon light or other suitable Picatinny accessory beneath the replica. Naturally, the available space and position are affected by the compensator, so please check in advance that the dimensions and mounting base of your chosen accessory are suitable.

Built-in Li-ion battery with USB-C

The SpitFire is powered by a built-in rechargeable Li-ion battery and therefore does not require any separate, replaceable batteries. It is charged via the USB Type-C port.

A maximum capacity of approximately 30,000 tracer BBs is specified per full battery charge. The actual number depends on the operating conditions and the selected mode. This is because, when tracer illumination and muzzle-flash simulation are used simultaneously, both functions are powered by the same battery.

Quick Charge en accustatus

As well as standard charging, the SpitFire supports a Quick Charge function. According to the specified technical data, approximately five minutes of charging can provide enough power for around 1,000 shots.

The unit also features a red/green battery status indicator. This makes it easier to check the status of the built-in battery before you start a skirmish.

Shake Wake and automatic standby

To minimise unnecessary energy consumption during breaks, the SpitFire automatically switches to standby after approximately five minutes of inactivity.

Thanks to Shake Wake, movement can then reactivate the electronics. This means you don’t have to switch the tracer off and on again manually every time during short breaks.

Polymer housing with aluminium rail

The main housing of the compensator is made from polymer, whilst aluminium is used for the lower accessory rail. This keeps the entire structure relatively light, whilst the mounting point for additional accessories is made of metal.

The M18 model is approximately 95–97 mm long and weighs around 80–82 grams. This makes it more compact and lighter than the longer M17 version. Nevertheless, bear in mind that the extra weight is at the front of the replica and may therefore affect its balance.

Tan version for an M18 build

This version features a tan finish and is therefore particularly suitable for an M18 build where the tan/FDE appearance of the replica needs to be retained. Furthermore, the integrated compensator fits the M18 very differently to a traditional cylindrical tracer fitted to the end of the barrel.

A slight difference in colour may still occur with tan and FDE parts. Different materials, surface treatments and production batches may mean that the shade of the SpitFire is not entirely identical to any other tan/FDE part on the replica.

CQB, indoor and night-time games

The combination of tracer and muzzle-flash simulation makes the SpitFire particularly suitable for CQB, indoor airsoft and night-time games. Tracer BBs make the trajectory of your shots more visible in low light, whilst the muzzle-flash simulation creates an additional visual effect.

As both functions can be set independently, you don’t always have to opt for the full lighting effect. For example, during a normal indoor skirmish, you can use just the tracer, whilst both functions can be combined during an evening game.

Practical insights

The 5KU SpitFire Tracer for SIG Air M18 Tan is particularly useful if you want to use a tracer without first having to fit a threaded outer barrel or a separate barrel adapter. The model-specific design not only gives it a seamless look but, thanks to the new Picatinny rail on the underside, also leaves space for a compatible accessory.

Before use, check that the QD mount is fully locked in place and ensure that the internal battery is sufficiently charged. You should also test the tracer BBs you intend to use during the skirmish beforehand. The brightness may vary depending on the brand, type and colour of the tracer BBs.

One important point to note is the holster. The SpitFire alters the length and shape of the front end of the M18. A standard-shaped M18 holster that fits snugly around the original replica is therefore not automatically suitable for this configuration.

Who is the 5KU SpitFire Tracer for SIG Air M18 Tan suitable for?

The 5KU SpitFire Tracer for SIG Air M18 Tan is designed for owners of a compatible SIG Air/VFC P320 M18 GBB who are looking for an integrated tracer solution for CQB, indoor airsoft or night-time games. The combination of powerful UV lighting, various effect modes and a compact, model-specific design makes the unit particularly appealing to players who regularly use tracer BBs.

The Tan version is also a logical choice for custom M18 builds where the tan/FDE colour scheme needs to be retained. Thanks to the quick-detach (QD) mount, USB-C battery and additional Picatinny rail, the visual ‘compensator’ look is combined with practical features for actual airsoft use.

Specificaties

• Note: 5KU
• Model: SpitFire Tracer for SIG Air M18
• Producttype: Tracer- en compensatormodule
• Platform: SIG Air / VFC P320 M18 GBB
• Tracer function: Yes
• Muzzle-flash simulation: Yes
• Effectmodi: Tracer + Muzzle Flash / Tracer Only / Muzzle Flash Only
• Tracerverlichting: 5W High Power UV LED
• Muzzle-flash illumination: 2 light sources on the sides
• Maximum processing speed: Approximately 35 RPS / 2,100 RPM
• Capacity per full battery charge: Up to approximately 30,000 tracer BBs
• Quick Charge: Around 5 minutes’ charging for approximately 1,000 shots
• Automatic standby: Yes, after approximately 5 minutes of inactivity
• Shake Wake / motion activation: Yes
• Battery status indicator: Yes, red/green
• Battery: Built-in rechargeable Li-ion battery
• Charging port: USB Type-C
• Montage: Quick Detach / QD
• Installation position: Lower rail of the M18
• Installation: Drop-in
• Threaded outer barrel required: No
• Permanent modification required: Not normally required
• Lower accessory rail: 20 mm / M1913 Picatinny
• Housing material: Polymer
• Rail adapter material: Aluminium
• Length: Approximately 95–97 mm
• Weight: approximately 80–82 g
• Colour: Tan
• Application: Airsoft

Common mistakes

• Do not confuse this M18 version with the longer SpitFire model for the SIG Air/VFC P320 M17.
• Use fluorescent tracer BBs if you want to see the actual tracer effect; normal BBs do not glow.
• Don’t expect a real muzzle flash from the muzzle-flash function. It’s just a simulated light effect.
• Don’t forget to charge the built-in battery before a long CQB session or an evening skirmish.
• Always check that the QD system is fully locked before using the replica.
• Do not assume that every standard M18 holster will still fit once the SpitFire has been fitted.
• Check the available space before fitting a weapon light or other accessory to the lower Picatinny rail.
• Please bear in mind the extra weight and the extra length at the front of the replica.
• Don’t expect every Tan or FDE shade to match the colour of the M18 exactly.
• Please regard the approximately 30,000 tracer BBs per battery charge as a maximum figure; actual energy consumption depends on the functions selected and the conditions of use.

Frequently Asked Questions

Which airsoft replica is this 5KU SpitFire intended for?
This version has been specifically designed for the SIG Air / VFC P320 M18 GBB.

What is the difference between this and the M17 version?
The M18 version is designed for the more compact M18 platform and is shorter and lighter than the model-specific M17 version.

What effect modes does the SpitFire have?
You can choose from Tracer + Muzzle Flash, Tracer Only or Muzzle Flash Only.

What kind of lighting does the tracer use?
The unit uses a 5W high-power UV LED for tracer BBs and two additional light sources for the muzzle-flash simulation.

How fast can the tracer process BBs?
The specified maximum processing speed is approximately 35 RPS, or around 2,100 BBs per minute.

How many tracer BBs can the unit process on a single battery charge?
The maximum specified figure is approximately 30,000 tracer BBs per full battery charge. The actual result depends on the functions used and the conditions.

Does the M18 SpitFire have Quick Charge?
Yes. According to the specified technical details, approximately five minutes of charging can provide enough power for around 1,000 shots.

Does the tracer have an automatic sleep mode?
Yes. After about five minutes of inactivity, the unit switches to standby. Thanks to Shake Wake, movement can reactivate the electronics.

Can I check how much battery power is left?
The unit has a red/green battery status indicator.

Do I need a threaded outer barrel?
No. The SpitFire is mounted on the bottom rail of the M18 frame and does not require a threaded outer barrel.

Can I remove the SpitFire quickly?
Yes. The module uses a Quick Detach mounting system.

Can I still fit a weapon light?
Yes, provided it is compatible. There is an aluminium 20mm / M1913 Picatinny rail on the underside.

How big and heavy is the M18 version?
The M18 version is approximately 95–97 mm long and weighs around 80–82 grams.

Does the Tan version also fit the M17?
No. There is a separate, model-specific SpitFire version for the longer M17.

Will my standard M18 holster still fit?
Not necessarily. The compensator alters the profile and overall length of the replica. You should therefore check separately whether the holster is suitable for an M18 fitted with this module.

The 5KU SpitFire Tracer for SIG Air M18 Tan combines a 5W UV tracer, adjustable muzzle-flash simulation, quick-detach (QD) mount, USB-C battery and Picatinny rail in a compact Tan upgrade specifically designed for the SIG Air/VFC P320 M18 GBB.