Here comes a quick mini review of the SparkLabs WOLF HPA engine with a short build log to install in a VFC Mp7 aeg.

I will try to provide links and advices to most of the build.

I can not write and extensive review of the engine yet, only spent ~3000 rounds through it.

What I can already tell, this is the best engine I tried so far, it has functions I yet to see before.

The air consumption is minimal, with a 3000psi 0.2L 13ci bottle you can expect several 1000shots.

The nozzle length is fine tubeable, you can install in any center nozzle box with external switches connected to the board, some box will require a custom lenght nozzle, but if you install in a standard V2 box you can program the fire selector with many options. In my build there is just simple full and semi auto with 2 micro switch.

As far as externals go it’s a simple VFC aeg Mp7, there are some cuts and such to install the 3D printed shell, but nothing major.

Installed a Clutch Precision M-lok handguard. You can find it here: https://clutch-precision.com/en-eu/products/mp7-mlok-lightweight-t6-aluminum-handguard?_pos=1&_sid=b19d2b17a&_ss=r

12cw to 14ccw thread adapter, it’s custom made but you can find many similar, to install a Silverback carbon 14ccw medium supp.

If you deceide to build one, I highly suggest to throw away the spring and follower of the mags, those are subpar and will cause serious feeding issues. I installed a spring and follower in each mags from Cyma 130rds Mp5 mags. Feeds flawlessly since.

For the HPA build you will also need the external barrel, the trigger, selector switch, to controll the two micro switch connected to the board of the engine. You can use any switch that fits, if you wire them correctly it will control the engine just fine.

Here comes the complicated part, the printed shell for the engine. There is no straigh up file for the WOLF, so it needed some mods, but Polarstar P2, Jack, Gate Pulsar S and D have straight files to fit with without mods.

To get the acces to all the files, but this one: https://cults3d.com/en/3d-model/gadget/vfc-mp7-aeg-hpa-conversion-kit-using-p-jack-or-f2

Than you go to the discord you can find in the file description, from that point you will be guided to acces all the files.

The one I used is version MK2.1 for Pulsar D, than modified to fit the WOLF and Silent Industries Alpha MTW chamber.

The choice of chamber was obvious, it’s the best MTW type chamber, also installed one of mine MTW barrels, the 208mm one. https://sniperupgrades.com/product/6-04-mtw-7-stainless-steel-hybrid-barrel-208mm/

The shell I choose was SLS 3D printed, in theory any good filament print would work, but I wanted a durable option.

Some mods done, the FCU barely fit, but fit just right… Also made some room for the Alpha chamber, the file is made for slightly different shaped MTW chamber.

The fire controll group only consist off 2 wtiches, like most externally controlled solutions for HPA systems. One switch is the trigger, I used a tactile micro switch, similar to gamer mouse switches. The other switch controls the full auto, it’s a simple microswitch, it’s engaged when run on semi, when it’s off that turns to full auto.

With this solution you lose mechanical safetly, at the discord you can find a file to print a mechanical piece for the selector, which blocks the trigger when turned to semi.

These are the basic steps for the build, you can find all the details on the engine on the site of SparkLabs here: https://sparklabs.si/

I hope you build one too!

If you have questions feel free to hit me up with them.

Stay tuned!