AK 74 Double Feeding

[Alexei]

Hello, I need help. I have a Dboys AKS 74, stock mechbox. It was shooting great for the longest time, then about three weeks ago the hop up started too malfunction. So I replaced the stock rubber with a Gaurder hard type.

When I shoot its like there is no hop up even with it maxed out, So I thought maybe the hard type is no good for my gun so I got a Gaurder clear soft type rubber. After many attempts too get it into the hop up because its so fucking soft and gets snaged on the way in, I finaly got it in.

Now the problem. After I put in the soft type the gun first jammed many times, then after it stoped jamming and now it double feeds. I shoot on semi once and two bbs fly out, with shit range of course. I need some help, Im out of ideas what could be causing the double feed?, Can it be the actual hop up assembly, I dont think its the air seal issue because I tested it and the piston stops from the pressure, Please help

[OneSpeed]

Maybe your adjustment slider is too far back, cause My Hop up had the same problem, due to the nub being too far down and just not letting BBs through, lowered the hop up, and feeds fine again!