A while ago I received the HPA kit by Silverback made to their MDR platform for testing.

Let’s start with the most commonly asked questions, the engine is a single solenoid open bolt system with it’s own FCU.

Since they did not had to stick to the AEG form factor and squeeze in a small bullet valve into the cylinder are they used a much more effective industrial solenoid valve.

The system itself is way more effective on much lower PSI. You can read the fps/psi/J levels in their downloadable Advanced User Manual on their site, but in my own setup my J results are WAY higher than those. In details I have 1.6J on .40 with 310mm 6.04 barrel at 70psi. That is with the stock nozzle it comes with, which has a 40% flow rate, there is a 100% flow nozzle which I will test soon.

Also thanks to this solenoid, the ROF can reach extremes, I set mine to 36rps, but it can be as high as 50, that requires higher pressure and a high end regulator tho.

Their FCU replaces the original trigger board, two screws, nothing complicated. The programing done with trigger and fire selector, I suggest to check the Silverback video on it, they show it in details, and I way too noob in it to properly explain, but if I managed to do it, you will too.

The chamber is based on previous aeg version, but there is a tab which prevents double feed entirely. The tab lifted by the nozzle and let’s a bb feed, so far I did not have a SINGLE double feed, missfeed or jam… Even with the chapest 5€ battleaxe m4 mags, fed properly with everything I had at hand.

The chamber takes aeg type rubbers, but suggested to use SRS type one, since it can feed with the tighter lips but seals better. Also compatible with my 101% SRS seals and r-hops.

Assembly itself is straight forward, AEG internals out, HPA internals in, only thing you have to do is drill the hole for the airline. Other than that it can be turned back to AEG in a few minutes.

Summing it up this HPA kit seems like a good option for those who don’t want to play with electric version, for me the main selling point is the silence of the system.

Regarding the range and accuracy you can expect the same as other high end platform, I can mostly compare that to the teamates kitted out MTWs.

The next step in my testing will be installing the 100% flow nozzle, and potencially use it as DMR to see it’s maximal potencial.

Stay tuned for the next post!