5KU SpitFire tracer for Sig Air M17 Black

The 5KU SpitFire Tracer for SIG Air M17 Black combines a tracer unit, muzzle-flash simulation and compensator-style housing in a single attachment for the SIG Air / VFC P320 M17 GBB airsoft replica. Instead of mounting a traditional tracer onto a threaded section of the barrel, this version is attached directly to the underside of the frame. This creates an integrated design that is specifically tailored to the M17 in terms of length and shape.

The built-in SpitFire tracer has three adjustable modes: Tracer + Muzzle Flash, Tracer Only and Muzzle Flash Only. A built-in rechargeable Li-ion battery provides the power and is charged via USB-C. The body is primarily made of polymer and is combined with an aluminium rail structure, whilst a Picatinny interface remains available on the underside for compatible accessories.

Tracer and muzzle-flash simulation in a single system

The integrated SpitFire unit can both illuminate tracer BBs and simulate a visible muzzle-flash effect. Using the various modes, you can choose which effect to use whilst playing. You can opt for illuminated tracer BBs only, the muzzle-flash effect only, or both effects simultaneously.

For CQB, indoor skirmishes and night-time games, it is the combination of features that is particularly appealing. Tracer BBs make the BBs’ trajectory more visible in low light, whilst the muzzle-flash simulation adds an extra visual effect with every shot. The openings in the compensator housing help to make this light effect visible at the front.

Designed for the SIG Air / VFC P320 M17

Unlike universal threaded tracers, this 5KU has been specifically designed for the SIG Air / VFC P320 M17 GBB. The elongated compensator shape complements the length and contours of the M17 and, once fitted, blends seamlessly with the replica.

This makes this product particularly appealing to players who want to add a tracer without simply fitting a cylindrical tracer unit to the outer barrel. Please take care to check the model: 5KU also produces a shorter version for the M18, which is not the same product.

QD mounting on the bottom rail

The compensator is attached to the front of the M17 frame via a Quick Detach mounting system. The replica’s existing bottom rail is used as the mounting base. This means that no threading is required on the outer barrel, and the unit can be fitted without making any permanent modifications to the replica.

The QD design also makes it possible to fit or remove the compensator relatively quickly. After fitting, always check that the system is fully locked in place before using the replica.

Picatinny rail remains available

As the SpitFire uses the M17’s original bottom rail for its own mounting, 5KU has added a 20mm aluminium Picatinny rail to the underside of the compensator. This ensures that a mounting point remains available for a compatible accessory.

This is useful, for example, if you’re already using a suitable weapon light on the M17 and want to continue using it with the tracer compensator. Do check beforehand, however, that the dimensions and mounting base of the accessory allow sufficient space within the new configuration.

Built-in Li-ion battery with USB-C

The tracer is powered by a built-in rechargeable Li-ion battery, so no separate batteries are required. It is charged via the USB Type-C port on the unit.

According to the available product specifications, a fully charged SpitFire unit can fire up to approximately 30,000 tracer BBs. The actual number depends on usage and the functions selected. After all, the muzzle-flash function also draws power from the same built-in battery.

Automatic standby and motion activation

The SpitFire has an energy-saving standby function. If the unit is not used for approximately five minutes, it automatically switches to standby. The tracer is then reactivated by movement.

This prevents the battery from draining unnecessarily during breaks, whilst also meaning you don’t have to keep switching the tracer on and off manually. This is a particularly practical feature during longer CQB or evening skirmishes.

Suitable for fast-paced airsoft play

The SpitFire tracer is specified to have a rate of fire of up to approximately 35 RPS, or 2,100 rounds per minute. For use on the M17, this primarily indicates that the tracer can react quickly enough to illuminate BBs during rapid successive shots.

To achieve the tracer effect, suitable tracer BBs must be used. Normal BBs do not contain any material that is activated by UV light and will therefore not suddenly start to glow – no matter how hard the tracer tries.

Polymer constructie met aluminium rail

The main housing of the compensator is made from polymer, whilst aluminium is used for the mounting and rail sections. The 5KU thus combines a relatively lightweight outer structure with a metal interface at the point where accessories are fitted.

The complete unit is approximately 12 cm long and weighs around 100 grams. Please bear in mind that this adds extra length and weight to the front of the M17, thereby altering the balance and overall dimensions of the replica.

Ideal for CQB and night-time games

The 5KU SpitFire Tracer for SIG Air M17 really comes into its own during indoor airsoft, CQB and skirmishes in low-light conditions. With suitable tracer BBs, you can track the BB’s flight path more easily, which is both practical and visually appealing.

The muzzle-flash simulation adds an extra effect without requiring you to use both functions at the same time. For a more understated setup, only the tracer function can be enabled, whilst for maximum visual impact, both functions can be combined.

Practical insights

The 5KU SpitFire Tracer for SIG Air M17 Black is particularly interesting if you’re specifically looking for an integrated tracer solution for the M17. The frame-mounted attachment means you don’t need a threaded barrel or a separate tracer adapter, whilst the lower Picatinny rail allows you to continue using a compatible accessory.

Before every match day, check that the QD mount is properly locked in place and fully charge the internal battery in advance. You should also test the tracer BBs you intend to use before buying a full bag for an event. Not every colour or brand of tracer BB reacts equally strongly to every tracer unit.

You should also bear holsters in mind. The compensator significantly alters both the length and the profile of the M17. A standard-shaped M17 holster that fits snugly around the original slide and front end will therefore not necessarily remain suitable.

Who is the 5KU SpitFire Tracer for SIG Air M17 Black suitable for?

The 5KU SpitFire Tracer for SIG Air M17 Black is designed for owners of a compatible SIG Air/VFC P320 M17 GBB who wish to combine tracer functionality with an integrated compensator-style appearance. The combination of tracer and muzzle-flash effects offers clear added value, particularly for CQB, indoor ranges and night-time games.

The unit is also of interest for M17 builds where a standard cylindrical tracer does not match the desired look. Thanks to its model-specific design, the SpitFire blends in better with the M17’s lines, whilst the underside remains compatible with suitable Picatinny accessories.

Specificaties

• Note: 5KU
• Model: SpitFire Tracer for SIG Air M17
• Producttype: Tracer / muzzle-flash compensator
• Platform: SIG Air / VFC P320 M17 GBB
• Tracer function: Yes
• Muzzle-flash simulation: Yes
• Effectmodi: Tracer + Muzzle Flash / Tracer Only / Muzzle Flash Only
• Tracer lighting: UV LED
• Specified maximum processing speed: Up to approximately 35 RPS / 2,100 RPM
• Specified capacity per full battery charge: Up to approximately 30,000 tracer BBs
• Automatic standby: Yes, after approximately 5 minutes of inactivity
• Physical activity promotion: Yes
• Battery: Built-in rechargeable Li-ion battery
• Charging port: USB Type-C
• Mounting: QD mounting on the M17’s lower rail
• Permanent modification required: No
• Lower accessory rail: 20 mm / M1913 Picatinny
• Compensator material: Polymer
• Material of rail/mounting bracket: Aluminium
• Length: Approximately 118–120 mm
• Weight: approximately 100–105 g
• Colour: Black
• Application: Airsoft

Common mistakes

• Do not confuse this version with the 5KU SpitFire for the more compact P320 M18; there is a separate model for that.
• Don’t expect standard BBs to glow when the tracer function is activated. You’ll need suitable tracer BBs to achieve the tracer effect.
• Don’t forget to fully charge the internal battery before a long skirmish.
• After fitting, always check that the QD system is fully locked.
• Do not assume that every existing M17 holster will still fit once the compensator has been fitted.
• Please bear in mind the extra length and weight at the front of the replica.
• When fitting a weapon light or other accessory, check that the mounting base is actually compatible with the lower Picatinny rail.
• Don’t expect the muzzle-flash function to produce real muzzle flashes; it is a visual light simulation for airsoft.
• Before use, check that the tracer unit is set to the desired effect mode.

Frequently Asked Questions

Which airsoft replica is this 5KU SpitFire designed for?
This version is specifically designed for the SIG Air / VFC P320 M17 GBB.

Does this tracer also have a muzzle-flash effect?
Yes. The integrated SpitFire can simulate a visual muzzle-flash effect as well as illuminating tracer BBs.

Can I use the tracer and muzzle flash separately?
Yes. There are three modes available: Tracer + Muzzle Flash, Tracer Only and Muzzle Flash Only.

Can the compensator be removed quickly?
Yes. The design uses a quick-detach (QD) mounting system for relatively quick fitting and removal.

Can I still fit a weapon light?
On the underside of the compensator there is an aluminium 20mm Picatinny rail onto which a suitable accessory can be fitted.

What type of battery does the tracer use?
The SpitFire has a built-in rechargeable Li-ion battery that is charged via USB-C.

How many BBs can the tracer fire on a single battery charge?
5KU states that the SpitFire unit can fire up to approximately 30,000 tracer BBs per full battery charge. The actual result depends on usage and the selected effect mode.

Does the tracer switch off automatically?
The unit has an automatic standby function that activates after approximately five minutes of inactivity and can be reactivated by movement.

Does this version also fit the SIG Air M18?
No, a separate, shorter 5KU SpitFire M18 version is available for that.

Will my existing M17 holster still fit?
Not necessarily. The compensator significantly alters the length and shape of the front of the replica. You should therefore check individually whether the holster you are using provides sufficient space.

The 5KU SpitFire Tracer for SIG Air M17 Black provides a compatible SIG Air/VFC P320 M17 GBB with an integrated tracer, adjustable muzzle-flash simulation and a quick-detach (QD) compensator-style appearance, whilst a Picatinny rail remains available on the underside for suitable accessories.