In the picture below, the top Hop Up Chamber is the one from the H&K. Bottom left is a G&G version and on the bottom right is a SRC brand. As you can see by Red arrows, the cut out for the top of the hop up chamber is similar in design to the ICS version shown in the second picture, but I am not sure it will work. I tried the SRC version and even tried grinding down a spot and still no go.
Contacting Umerax USA was a waste of time and no response back from Evike when I asked about other MP5 Chambers that might work. Any help Appreciated on this.
